Get All Concept cars
Pick Dream Mode and start a new game and put in DREAMY as a brand name
Get All Tracks & Circuits
Pick Dream Mode and start a new game and put in WORLD as a brand name
All Production cars
Pick Dream Mode and start a new game and put in REALITY as a brand name
How to unlock Turbo
At the loading screen hold R and press Up, Down, Left, Right
Always check your factory between races. If production is slow you need more wins. If you can't compete in the current class drop down to a lower class to restore production.
THE PERFECT WAY TO SPEND YOUR PRODUCTION POINTS
Right when you start, but the 1st car that pops up.
If you have enough points to buy a second car, Don't do it right at that second. Wait for a couple more races, then you should buy the Zellion.
Then if you have enough for a 3rd car... DON'T BUY IT you only need 2 from every 4 of the categories. Roadster, Sport car,etc.
If you have 2 cars, you'll be getting at lest half more cars sold than you did with 1