No.
Snape comes back, but then dies.
The Deathly Hallows part 2 will come out on Friday July 15, 2011.
No, Voldemort is killed at the end of the book.
yes harry potter goes back to Hogwarts
No.
They are already out.
Well he didn't really die, but yes.
No, they do make a reappearance of sorts, but they are not resurrected.
Pg. 371. Ch. 19
He is really dead.
Harry Potter and the Deathly Hallows come out in November 2010 and July 2011 as there are two of them.
Part 1 of deathly hallows is coming out in November part 2 is coming out June or July