Some real oldies are:

Abbott & Costello Meet The Mummy
ABbott & Costello Meet Frankenstein
Dracula (the original wuth Bela Lugosi)
House of Wax

Here's a list of more oldies:
http://www.spritzels.com/halloween/halloween-movie.html

There are also some Vampire movies from the 60's that would be good.


Here's a list of halloween movies for kids:
http://horror.about.com/od/movierevi...hallowkids.htm

And my all time favorite:
Frankenweenie! (stars a Bull Terrier)