Hi Kim,
welcome.
In addition to the info we need to help you, you may want to scroll down and read some of the other posts, like Kicking, Hitting, Spitting, etc.
Did your son burn the truck seat with-matches he got on his own, or do you smoke?
I had a playing-with-fire issue a few wks back. That post has "Matches" in it and has an idea the child psychiatric gave us. (It has worked so far.)
Did he take the $ out from under your nose (flaunting) or did he sneak it?
Just trying to get some ideas.