The Kiss of Death episode you are referring to begins in Naruto Shippuden episode 60 and continues in episode 61. You can watch these episodes online at narutoget, the episodes are avaliable in both subbed and dubbed.
Note: all Naruto and Naruto Shippuden episodes at this website are all free to watch for everyone.
There is no first episode that Naruto and Hinata kiss because they don't kiss.
No where. Naruto and Sakura never kiss.
Sasuke
There was never a filler episode in Naruto or Shippuden that he kissed her ever.
Naruto Shippuden Episode 43 and 292. Both were when he was in Nine tails state.
There is no first episode that Naruto and Hinata kiss because they don't kiss.
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.
Episode 123
No where. Naruto and Sakura never kiss.
Their is an episode intitled "The Death of Naruto" (episode 165 season 4 on hulu).
At the last Eposode of Naruto Shuppden
No
in one episode they do
No
Sasuke