Okay, there's this old movie maybe from the 1990's or earlier and I don't know the name of it. It has this scene where there is a bullet-shooting small toy tank shooting at this young man in some building/house. The man I think puts a blanket over it to stop it. There's also a wild cat ready to jump at him when he enters another room. The man was young and had black hair... Btw it wasn't a cartoon, it had real people.
It sounds like you are referring to the movie, "Small Soldiers".
When missile technology is used to enhance toy action figures, the toys soon begin to take their battle programming too seriously.
From the link: http://www.imdb.com/title/tt0122718/
I'm pretty certain you're talking about Xtro, an absolutely insane British Scif Fi horror from 1983. I saw it on VHS a few years after it came out. I was only 11, I think. It was one of the first horror movies I ever saw.