Pretty sure its episode 32
Naruto Shippuuden does not have "Seasons". It has Sagas (like all Anime series') The Saga in which Naruto defeats Pain is called the "Pain Invasion Arc".
In fact, naruto shippuden is the continued season of naruto in japan
The rescue Gaara (Kazekage) arc begins at Naruto shippuden episode 8.
No, Naruto and Hinata do not kiss at all or even see much of each other in the original shippuden manga. But since they added an extra arc in the anime it may not follow the real story. But there is no romance between the two. Hinata's feelings are completely onesided. Naruto does not notice how she feels.
Yes, but only of the next Naruto Shippuden game's storyline goes to the Sasuke & Sai arc!
fourth great shinobi war arc.
140-150
NARUTO: Zabuza Arc Chunin Exam Arc Leaf Destruction Arc Tsunade Search Arc Chasing Sasuke Arc NARUTO SHIPPUDEN: Saving Gaara Arc Sasuke Reunion Arc Immortal Duo Arc Sasuke vs Itachi Arc Pain Arc War Arc
it will go up to the pain invasion arc
In the Hunt for Uchiha arc
No, unless you count that one kiss Naruto had with Sasuke (again) in the filler arc in episode 194
Sai joins team 7 in Naruto shippunden episode 34