Yes. Kakashi does die when fighting Pain. (He uses his Mangekyo Sharingan to protect Choji and dies). But he is soon revived after Naruto talks to Nagato.
Masashi Kishimoto is the Author and illustrator of Naruto the manga .
No. Kakashi Gaiden is in Shippuden for both the anime and manga.
Naruto Shippuden, continues the story of Naruto.The title of the show is named after the main character, Naruto (an eponym).
Episode 220: Departure
There are a lot of manga series. Some of them go unmentioned, but some popular titles are: Death note Bleach Naruto/Naruto Shippuden One Peice
The manga series "Naruto" covers Kakashi's childhood in various chapters throughout the series, starting from Chapter 239. Additionally, there is a light novel called "Naruto: Kakashi's Story" which further delves into Kakashi's background and experiences during his youth.
i would say that would be in episode 437 on the manga series.
Naruto becomes a teenager in volume 28 of the Naruto manga series.
Manga is the original Naruto/Naruto Shippuden source in which the anime comes from.
Naruto Shippuden episode 199
for the second time it could possibly be naruto shippuden episode 217 as manga 475 is naruto shippuden episode 208 and in manga it is only 9 more chapters left until they meet again so it could be somewhere between naruto shippuden 215 and 219
It is unrevealed yet, even in the manga, if Naruto defeats Sasuke in Naruto Shippuden.