I guess you are after episode 98 (part 1)
no
Naruto Shippuden episode 90
yo can see him in naruto shippuden episode 1!
In the anime, it's a flashback in episode 161. Naruto teaching Konohamaru the rasengan was actually done off screen. In the flashback, Naruto is describing the rasengan to Konohamaru, who thinks he's about to teach him another sexy jutsu. Hope that helps.
Sometime during Season 1 - 3
Naruto taught Konohamaru the Rasengan. Naruto said: "It's time i passed things down onto others." Maybe because the Sarutobi is Wind-Natured and because Konohamaru is like a brother to Naruto. Also remembering Naruto promised to fight Konohamaru for the title of Hokage, Naruto wanted him to get stronger.
Naruto meets Sai right after returning from his mission to save Gaara. In the manga that would be book 32.
episode 60 in naruto
naruto fight against sasuke
When everybody is going to fight in the war konohamaru gets excited. He goes to Lady Tsunade to ask her if he can also participate in the war. Lady Tsunade gets too angry at Konohamaru and blasts him out of her room. At that time Udon and Moegi sees that someone is coming, they drag Konohamaru to bush. They see that the person is Temari the elder sister of the Kazekage Gaara. They see Temari going inside the room of the hokage. After Temari comes out of the hokage's room she sees that Konohamaru is challenging her to a battle. Episode no:234 Naruto Shippuden
it starts at episode 163
I think it's episode 99 "The Will of Fire Still Burns"
Yes, The hokage place was actually for Naruto but Naruto gave it to Konohamaru ( 7th Hokage )