The killing curse, Avada Kedavra.
Yes, he does kill Lord Voldemort in the end of Deathly Hallows.
Lord Voldemort is correct. His real name is Tom Marvolo Riddle. I Am Lord Voldemort is an anagram of Tom Marvolo Riddle.
Destroy the horcruxes
Lord voldemort is the person who killed harry's parents and he is now seeking to kill Harry
Voldemort's own spell kills himself.
Lord Voldemort's death eaters didn't kill him because they were his followers, they believed in what he was doing and thought he was right. They didn't kill Harry Potter because Lord Voldemort specified that he must be the person who killed Harry.
Voldemort killed James with the Avada Kedavra killing curse.
Harry potter kills Voldemort ( aka "you know who" or the dark lord or He Who Must Not Be Named
Yes, Ron destroyed one of Lord Voldemort's Horcruxes - killing a piece of his soul.
He himself is not a book; Lord Voldemort is a character in a series of books titled "Harry Potter." He is the antagonist trying to kill Harry.
Book 7
He used the killing curse.