Yes, Kakashi does die during the battle against the Akatsuki. Although later Naruto manages to convince Pain to bring everyone back to life who died during the battle. So Kakashi is currently alive and breathing.
Not in Naruto and not yet revealed in Naruto Shippuuden.
He does die in Naruto Shippuden episode 159 but he comes back to life again later on in the manga chapters along with Hinata, Choza(Choji's dad) Shizune and many more. You can watch the episode on narutoget.com. The name of the episode is Pain vs. Kakashi.
First I think you mean "Sasuke" and no he did not die in shippuden.
he dident die 0.0
orochimaru dies in episode 138 of naruto shippuden