That wagon was in "Is It College Yet?", which was the 2nd made for TV Movie. It really should be listed under a whole new title.

http://www.imdb.com/title/tt0285627/

I tried to get some vehicles from this, and I found so many of them to be generic I decided against adding images from here.

Tom's Jag is already listed in "Is It Fall Yet?"
http://www.imcdb.org/movie_250440-Is-It-Fall-Yet.html