All right I have just bits and pieces of this movie in my head.
I remember it had a puppet in it that was a Ghost.
There were kids who were trying to help it find a treasure (that ended up being paper bonds) in a hollywood storage thing.
In the beginning of the movie the kids were filming a horror moive I think. And the girl in the movie was making out with a boy on a sofa. She kept ruining the shot because the boy kept putting his toung in her mouth.
There was a car chase I am prettty sure.
If anyone can help with this I would be very grateful.
Annie

I found the answer myself.
It's a move called Ghost Chase.