Ok, I'm going to give the full list for anyone who looking it up!
Up on the D-Pad to summon a car! A (green) to boost! B (red) to Power Slide! X (blue) is to get in and out!
"Iron Demon Ranch" and "Headlands Transit Depot" have ATV's (Runners) for sale! "Headlands Transit Depot" has cars (Rollers) for sale! At this time the cars with guns (Cerberus) is unknown to get! You can also get them out of random shops as a sale item!
If you finish all 5 "Pedal to Metal" you get the black Dodge Challenger (and someone already has it)!