In the world of car racing, speed is power and you are nothing if you can't compete with some of the best. Your family might like you, but other than that, no one will care. In the USA, you will see lots of car owners using their car to race. Though, their cars aren't for racing, they don't mind it. As long as they are having some fun, they will keep on doing it.
Drive your car as fast as you can till you reach the finish line. You need to be in the top three position to unlock a new level. Like any car racing game, you will get rewarded according to your position at the race. Upgrade your car once you have enough money because you are going to need it.