The answer is!
1 The Simpsons
2 The ninja turtles
3 South park
4 The smurfs originaly the Stroumpf
5 Asterix Obelix and the dog Idefix (all in french)

6 I had Harold and Kumar???? I think that is wrong?!
7 Donald duck & kids
8 Lucky luke and the Dalton Bros (Joe, Jack, William and Averell)