well none
Naruto Episode 80
Naruto episode 216
in shippuden episode 5 or 6
there is no last
By "fake gaara" i think you might be thinking of the flower defence? if this is right it should be episode 186 of naruto shippuden, hope this helped
He punched him in the face in episode Naruto Episode 79- Beyond the Limit of Darkness and Light.
The rescue Gaara (Kazekage) arc begins at Naruto shippuden episode 8.
That episode does not exist.
Shippuden 19
He is first seen in chapter 35/episode 20.
Gaara doesn't know that Naruto is a Jinchuuriki yet. He only knows that Naruto has compassion for him and who he is. All other characters know he is a Jinchuuriki. We all anticipate the manga/anime that Gaara finds out Naruto is a fellow Jinchuuriki. Then and only then will Gaara see why Naruto cared so much for him, despite being from formal rivally villages.
The episode you are referring to is "Naruto Shippuden" Episode 32, titled "Return of the Kazekage." In this episode, Sakura and Gaara are discussing the Sand Village's future and Gaara shows her a room with books that he has been reading.