Bilbo is originally chosen as the “lucky number,” so that
Bilbo is lucky when he is saved by the Eagles, because without their help, he would have been killed from by fire. When Bilbo awakens to find the spider wrapping him up in its web, he is lucky that he woke up when he did because if he did not, he would have been captured along with the rest of the group.
A fish splashes in the water at the very moment Bilbo is trying to respond to a riddle to which the correct answer is "fish." When Bilbo asks for more time to solve another riddle, he again is "saved by pure luck" because asking for more time helped him realize that "time" was the correct answer to the riddle in ...
Bilbo was brave and full of wild delight, not afraid to be himself even when others thought him queer, and loved tricks and games. He was very good at riddles, even then, and this becomes a key quality that Gandalf seeks in him later when appointing him to the role of Burglar.
While Frodo is selfless and noble, Bilbo has to do a little more personal growth. The Bilbo who returns to Bag End in the end is a very different hobbit than the one who originally set out with Gandalf and 13 dwarves. Over the course of his adventure, Bilbo finds a courage, ingenuity, and selflessness within himself.
The first is that Bilbo is a hobbit, and as such, is particularly difficult to manipulate or corrupt. Hobbits have a natural resistance to the influence of the ring, because they are fully content in their simple lives and have no desires for power or war.
Hobbits are simple creatures and do not wish for much, so there is nothing for the Ring to use against a hobbit. Frodo is the hobbit that is corrupted the most next to Gollum and Bilbo, which is why he is unable to throw the Ring into the fire.
The bravest thing Bilbo does is to keep going into the dragon's lair. Alone in the tunnel, he begins to detect signs of Smaug's presence, but instead of stopping or turning around, he continues on, all the way to confront Smaug alone.
He had already celebrated his 131st birthday, becoming the oldest Hobbit in the history of Middle-earth. As a mortal, he died in the West. While sailing west, Bilbo composed a last poem looking back on Middle-earth in farewell.
Frodo and Bilbo were comfortable and well off until T.A. 3001. At this time, Bilbo threw an enormous party to celebrate his 111th birthday, and Frodo's 33rd, the date of Frodo's coming of age. At this party Bilbo gave his farewell speech, and made his long-planned "disappearance" and withdrawal from the Shire.
While there is no official answer for why Bilbo and Sam were able to be rid of the Ring without too much issue, there is a lot of supporting evidence that suggests it was partially due to their inner morality, as well as partially because of the Ring choosing its own path.
Because Bilbo began his time with the ring in an act of kindness (not killing Gollum when he had the chance, but showing him mercy and compassion instead), he was protected from the worst of the ring's influence.
Bilbo is very unhappy about leaving Lake-town and heading to the Lonely Mountain. Having exercised great bravery and cleverness in helping the dwarves escape from the Elvenking's prison, Bilbo now seems to revert to his milder hobbit nature in his unhappiness about going on to the Lonely Mountain and Smaug the dragon.
Like most hobbits, Bilbo is fond of the comforts of home and hearth: He loves good, simple food in abundance, and he loves his pipe and well-furnished hobbit-hole.
Bilbo, meanwhile, regrets calling himself “barrel-rider,” since this will cause Smaug to think of Lake-town and to attack it.
In J.R.R. Tolkein's The Hobbit, Bilbo Baggins became extravagantly wealthy by looting the treasure of the dragon Smaug (which he split with the dwarves).
That said, the people behind the “official movie guide” for The Lord of the Rings list Legolas as being born in the year 87 of the Third Age of Middle-earth, which makes him some 2,931 years old around the time of the War of the Ring, which happened over 3,000 years into the Third Age of Middle-earth.
Gandalf's age is impossible to determine, but he's likely existed for at least 10,000 years, making him much older than Legolas.
They're not immortal. The Undying Lands do not confer immortality on mortals. This was the big lie that Sauron told to Ar-Pharazôn the Golden to persuade him to attack Valinor: that those who went there became immortal. In fact, being in Valinor itself actually shortens the lives of mortals.
Unsuccessful, he returned to his hoard to lie in wait. The Dwarves sent Bilbo down the secret tunnel a second time. Smaug sensed Bilbo's presence immediately, even though Bilbo had rendered himself invisible with the One Ring, and accused the Hobbit (correctly) of trying to steal from him.
Bilbo slips on his ring and descends through the tunnel. He feels the heat of Smaug the dragon and hears its snoring and, in a moment of great bravery, he determines to go on despite his fear.
Nevertheless Bilbo plays a crucial part in the events and is declared a hero (Clark 43-44). A warrior would have killed Gollum like Beowulf killed Grendel, but Bilbo chooses not to kill him and still remains a hero because he makes a heroic decision by showing mercy.
While the previous 19 rings were crafted with the help of the Elves, the final ring, the 'One Ring to rule them all,' was crafted by Sauron alone; with the ability to dominate the other rings, the One Ring was made with some of Sauron's own power, in order to make it more powerful.
The Fellowship can't ride eagles to Mordor because of the giant, flying snake-dragon monsters ridden by One-Ring-sensing warrior kings and their half-mile-wide aura of fear.
Arwen isn't necessarily dying because of the Ring, but now that she is mortal, she is dying through the slow decaying of time. Arwen also faces the same fate as all those in Middle Earth should the Ring Bearer fail his mission. So in that way, her fate is tied to the Ring.