Another movie featuring Amy Adams that I've got a list of is 2005's "Junebug." This actually stars Embeth Davidtz, who you probably remember from Schindler's List and Matilda more than any other movie.

http://imdb.com/title/tt0418773/
1)1978-83 Ford Fairmont
2)Volvo Unknown
3)1991-1996 Toyota Camry Sedan(two of them).
4)1973-79 Ford F-Series Pickup.
5)1990's Dodge Ram Van(B-1500 or B-2500) Camper Van.
6)1991-96 Mercury Tracer Sedan.


Unfortunately this list is incomplete.