Earn fast money
Buy a car wich is less than 394bhp and race in station wagon cup. You will win $6000 and a car worth $6500

Tip: After taking a few quick spins in the arcade mode, go into Gran Turismo mode and start qualifying for your license. This is the best way to learn how the cars handle and which driving techniques you'll need for later races.

Tip: When picking a car at a dealer, don't buy the most expensive car at first. Instead, use the extra cash you save to upgrade your car; this will help you consistently place higher and ultimately win more money and races.

$16 Million :
At the screen where you choose Simulation or Arcade, press Start + Select.

Easy money
On the screen after you choose simulation press X, O, L1, L2, R1, R2 and X, O and you will get 10 million

Easiest way to get the Concept Car
after you choose Simulation go to dodge. Then go to the concept car and press X, X, O, O, L1, L1, L2, L2 and then Triangle and Square.