They haven't kissed.
There is no first episode that Naruto and Hinata kiss because they don't kiss.
About what?
All the couples kiss in the final Naruto episode. They declare for each other and kiss. This happens in the final episode.
Naruto and Sasuke kiss in original episode 3 and Shippuden episode 194. The sceen when Sakura gives Naruto the kiss of life isn't anime yet.
They kiss in the final episode.
No where. Naruto and Sakura never kiss.
Episode 123
Sakura will marry naruto or sai.
At the last Eposode of Naruto Shuppden
No
No
Sasuke