for a 'starter' pack film camera, the 100 automatic, 250 or 350 are excellent options. They take the fuji peel apart films (fp-100b, fp-100c, and fp-3000b) as well as polaroid films you may find ranging from 664 to 669.
For more control over aperture/f-stops, the 180, 190, 195 (& 195 NPC) are the pro models, but will cost you more than a pretty penny. The Polaroid 600se, Mamiya Universal Press (black) and Graflex XL will also give you the option of roll film backs (6x7 & 6x9), 4x5 sheet film & 4x5 polaroid backs as well as the standard type 100 polaroid backs.
The resurgence of polaroid popularity on photo sharing sites has caused a significant rise in prices on auction sites but it's awfully easy to bide your time and find a pack film camera at a yard sales, flea markets, etc...
do a web search for "the land list" and it will give you details on lenses (plastic or glass), if it has a tripod mount, construction materials, and more.