Beat the bus in Face Off 4.
Unlock Face Off option
Finish championship mode once to unlock Face Off 1 against the Roadster.
Beat the Roadster in Face Off 1 to unlock it and Face Off 2 against another car.
Unlock Saloon GT
Beat the Saloon GT in Face Off 3.
Play in championship mode until you unlock Face Off 2 in the special options screen. Beat the Towtruck once to unlock it.
Unlock Ending bonuses
Finish game to unlock the Free Run mode have no vehicles on the road, Free Run Twin mode two player Free Run, and Credits options.
Increase your boost and get on the fastest car list
Drive on the wrong side of the road to keep increasing your boost. You can also drive in the center of a double lane. Use your turbo when your driving on the wrong side to get a half-full or full turbo. This will also help you get on the fastest car list by giving you the boost you need on straightaways.