Although the Boruto anime has only just shown the Baryon Mode, fans know what it means for Naruto and Kurama. Baryon Mode is a strength only accessible to Kurama and his Jinchuriki, where the chakra of both fuse together, similar to nuclear fusion, and give rise to new energy.
No, he could not. The whole process of Baryon Mode is combining chakra in a process comparable to. Essentially, Naruto and Kurama's chakra are both getting massively consumed and eaten away at to provide energy for the transformation.
Although Naruto usually uses the Six Paths' Sage Mode along with the Kurama Chakra Mode, there is no reason he cannot use it without Kurama's strength.
Although Naruto lost Kurama, his Six Paths Powers should still be accessible to him. In Naruto's fight against Madara, he displayed the ability to use Six Paths Sage Mode without tapping into the power of the chakra cloak.
No. That's because no Jinchuriki besides Naruto is as compatible with Kurama as he is. Being Kurama's Jinchuriki for 17 years and the nature of Naruto's eight signed seal that allows Naruto and Kurama's chakra to mingle makes Naruto's Kurama's perfect Jinchuriki.
Because Tailed Beasts are life-forms made of pure chakra, they are eventually reborn after dying. They will always come back, but until that happens, they're factually dead. So, deliberately creating some new Tailed-beasts to get Kurama back does not seem like something Naruto would do.
Frieza is easily capable of defeating Baryon Mode Naruto in base form. Prior to the events of Dragon Ball, Frieza destroyed Planet Vegeta while in his base form.
Naruto has been able to harness and collect the natural energy around him in order to enter Sage Mode even after Kurama's death. However, the sheer quantity that he was able to harness was far higher because of Kurama.
Naruto has always been a powerful character, but his possibility of obtaining a new-tailed beast after Kurama's death could make him stronger. The increased power from the new-tailed beast could surpass even Baryon Mode, making Naruto a force to be reckoned with.
In Boruto, however, fans witnessed Kurama's death and the questions rose up once again as to whether Naruto can win against Sasuke without him. To the fandom it seems that, although it would be extremely difficult, it is not impossible, and at worst the fight might result in a draw.
Although Boruto: Naruto Next Generations has already shown a Ten-Tails, it is unlikely that Kurama can be revived or extracted from it. Furthermore, the Baryon Mode essentially uses up Kurama's life-force, rendering it practically impossible for him to be revived in some way.
1 Baryon Mode
Baryon Mode powered Naruto Uzumaki up to great levels, and made him strong enough to overpower Isshiki Otsutsuki in battle. This transformation made him the strongest character in the story, and is Naruto's strongest form by far.
Although he has several stronger jutsu, however, the strongest is Sage Mode. The mode starts with Toad Sage Mode which further develops and becomes stronger with Senjutsu chakras. This allows him to take down Paths of Pain. And he didn't need the assistance of Kurama.
Monsters like Kurama can die, but they do not pass from physical wounds or age. Instead, they die when they expend more chakra than they can recharge, and they have tons of it. This has happened to Tailed Beasts in the past, but they do not stay dead forever.
Senjutsu Influence
Naruto's combination of Kurama Mode and Sage Mode. Naruto can combine his Nine-Tails Chakra Mode and its various forms with Sage Mode to further enhance his abilities with the power of senjutsu. His pupils become a combination of the two forms: the vertical fox-slits with the horizontal toad-slits.
Despite all of his efforts, Naruto will ultimately end up becoming the new Sage of the Six Paths, stopping his son and bringing a new era to the Shinobi World. He will be able to obtain power far greater than anything he had before, becoming not only the protector of Konoha, but also the entire human race.
Some assume that his son, Boruto, is the obvious choice to be the next Nine-Tails jinchuriki but there are other ninja that could step up to the plate. Here are five shinobi that would make a better jinchuriki for Kurama than Boruto.
No, sadly, he won't come back. Tailed Beasts are basically made of chakra, so when they're killed, they return to chakra and will be revived soon. However, Baryon mode consumes Kurama's chakra until he die, so there's no chakra left in him, that means he can't be revived anymore.
Although Naruto lost Kurama, he still has access to the powers of the other Tailed Beasts. During the Fourth Great Ninja War, he received a portion of the chakra of every Tailed Beast and has utilized this power to a great degree in all his fights since.
To answer your question, Naruto still has Six Paths Sage Mode after the death of Kurama, but he can no longer generate Truth-Seeking Orbs as he did in Naruto Shippuden.
Due to the number of drawbacks the Baryon Mode brings, Luffy will probably clinch victory in Naruto vs. Luffy if they break those modes out. Naruto vs. Luffy, in Baryon Mode and Gear 5 mode, would probably end in Luffy's victory since he's too unpredictable for the more grounded Naruto to handle.
1) Sasuke Uchiha
This shows that he would not be able to keep up with Baryon Mode Naruto's movements if the two fought. Sasuke was also demolished by Isshiki during each of their fights, and since Baryon Mode Naruto was able to match Isshiki for most of their fight, Sasuke would lose to Naruto.
4 Stronger: Baryon Mode
As his life force burns, Naruto can temporarily access a power that makes him stronger than even the Otsutsuki clan members. Without a doubt, this ability is much stronger than the Susanoo.