Quick start:
Hold A to accelerate during the pre-race countdown
until "Set" appears. Then, tap A a few times,
then hold the button again. If done correctly, you car will By getting a faster start when "Go" appears.
Cooler:
By winning all races in challenge mode, including the drag
races.
Formula 2:
By getting 100,000 miles in challenge mode without too many
fourth place finishes to unlock Formula 2. Alternately, By winning Exotica
mode with Glide.
Glide:
By getting 75,000 miles in challenge mode to unlock the Glide
car.
Heavyliftin (forklift):
By getting 5,000 miles in challenge mode to unlock the Heavyliftin
forklift.
Lil Lightnin:
By winning all the free style races.
Rail:
By winning Exotica mode with Whiplash.
Rocket:
By getting 100,000 miles in challenge mode to unlock Rocket.
Scrapin By:
By getting 95,000 miles in challenge mode to unlock Scrapin By.
Whiplash:
By winning Exotica mode with Formula 2.
Cars and modes:
By winning all the challenge races, complete Crusin Exotica
mode twice, By winning all the free style races, and By getting 40,000 miles
to unlock the Heavyliftin, Lil Lightnin, Jalopie, Bad Mobile,
Hunkajunk, Skidmarks, G Ride, Cooler, Piewagon, Boxcar, Scrapin
By, and Glide cars.