F1 - Infinite Car Charge
F2 - Infinite Car Conditions
F3 - Infinite Fuel
F4 - Infinite Money
First go into car then you will be able to activate fuel and charge cheats
First open car front hood then activate fix car conditions, If a engine still smokes after activating cheat then remove engine and place it in car again
First buy something in game from supermarket then activate money cheat then buy something again and you will get 999.