Okay, I'm going to start with the first five ambulances:

1)1978 or later Chevrolet Chevy Van.
2)Yes, that is a Cadillac.
3)1975-78 Ford Econoline.
4)Dodge B-300 KaryVan.
5)Dodge B-Series Maxi Wagon.

As for "Angelo's Car," it's a Lincoln Town Coupe.
http://www.imcdb.org/vehicles.php?make=Lincoln&model=Town+Coupe&modelMatch=1&modelInclModel=- on


I've got a copy of this movie, and I haven't watched it yet.