Laryngitis episode 18 of season 1
No, Puck hasn't died yet and there have been no announcements saying he would die in a future episode.
Episode 8 - Mash-up
Laryngitis!
Episode 3, Acafellas.
Never been kissed
Season 1, episode 11, Hairogrophy
Its episode 18 called 'Lady is a tramp'
Never been Kissed, episode 6.
the one where he was asking people to join the glee club and he met lauren
I believe it's episode 8 - Mash-Up
No, In that episode Puck is in Juvie. Mark Salling however, the actor that play's Puck was off working on his Music Career.
Puck joins glee club in Season 1, episode 4: Preggers, at the very end.