Naruto and Hashirama are reincarnations of Ashura. Not only that but they are related to each other somewhere down the bloodline. Also, Hashirama is technically his cousin or something since he married Mito Uzumaki who is of course, an Uzumaki. Lets start from the long past.
Hashirama Senju also married Uzumaki Mito, further strengthening the ties between the clans. In that sense, Naruto is related to Hashirama because Mito and Kushina are from the Uzumaki clan.
Tsunade was Hiruzen's student and the granddaughter of Hashirama and Kakashi was a beloved student of the Fourth Hokage, Minato. Also, of course, Naruto was the son of the Fourth Hokage and the student of the Sixth.
Ever since Konoha was created, it has always had a powerful Hokage at its helm, and it's their duty to protect the people and defend them from incoming threats. Konoha has seen seven Kage rise to this position so far. Here are all the seven Hokage of Konoha ranked according to their strength in Naruto.
Because of this, he had tremendous chakra up his sleeve and had great vitality, which was further boosted by him being a Senju clan member. After Hashirama, Naruto Uzumaki became the reincarnation of Asura Otsutsuki, while Sasuke Uchiha had Indra reincarnated into him.
Hashirama died during the First Shinobi World War, necessitating his brother Tobirama Senju replace him as Second Hokage. Tobirama would also die during the war, appointing his pupil Hiruzen Sarutobi as his successor before sacrificing himself to ensure his pupils' escape from Kumogakure's ninja.
The Uchiha clan lineage can be traced back to Indra's family. Asura married Kanna Otsutsuki and further led to the formation of Senju clan and the Uzumaki clan. Butsuma Senju, a descendant of the Senju clan, gave birth to Hashirama, who was the first Hokage and Tobirama Senju.
Kushina harbored the nine tails before Naruto was born. According to Hiruzen, she was made a jinchūriki because of her compatibility with the beast.
2) They first being was Kaguya Ōtsutsuki and from there all clans became created. Indra had the Uchihas, Asura had the Uzumakis (and the closely related Senjus), and Hamura had the Hyūga clan. So yes technically Hinata and Naruto are related, albeit very distantly.
Crunchyroll has every episode of Naruto, Naruto Shippuden, and Boruto: Naruto Next Generations in Japanese with English subtitles, and you can watch every episode free.
No, they did not. Luna married somebody else. As for Neville, he became a Herbology teacher at Hogwarts if I'm not mistaken.
Newt really did die in the Maze Runner Series. Thomas, Newt and Minho were at Denver, the Cranks break into the city. In The Death Cure, Thomas awakes in a white enclosed room and is stuck in there for weeks until it is revealed to him that he and his friends will be able to get their memories back.