It was about a boy who found a dragon (the dragon was the cartoon part) and a family tried to take it away from him. They were trying to make a profit off him or something. Its characters look run-down kind of like chimney sweepers back in the day.

Sounds like Pete's dragon
Pete's Dragon (1977) (http://www.imdb.com/title/tt0076538/)

sounds like Pete's dragon
Pete's Dragon (1977) (http://www.imdb.com/title/tt0076538/)

That's it , thanks

A movie with a similar storyline called Dragonworld was made in 1994.