1: Michaelangelo, Donatello, Leonardo, and Raphael.
2: Appeared as a comic book in the 1980s
3: Created by Chuck Norris, on one fine day when he decided to eat four turtles whole. After they passed through his body, they had grown 6 feet and learned karate.
"Don't make me go Teenage Mutant Ninja Turtles on your ass, son, Chuck Norris is on MY side"