Thanks Azimov!!! It's a nice site to reference. Unfortunately it doesn't have the information I'm looking for on the cars I mentioned.
I did, however, find one of the Aston Martin's on ebay so I asked the seller what the number was. They were kind enough to tell me! Yay! 600-7080 for the V12 Vanquish. They descirbed the color as dary gray / charcoal, and it's 27 MHz.
I'll do some more "digging" through the forums to see if anyone has mentioned the "Cars" movie cars. I did a search but maybe I'm not looking in the right spot. Still learning how to navigate the forum. :-)