Almost certainly the radiator requires cleaning or most likely for a 10 year old car, replacing. Have a garage look at it. I'd expect that the lower 1/4 of the radiator is deteriorated (corroded) badly. You should replace the radiator hoses and clamps at the same time.
The fans do not come on immediately when you start the engine. One comes on automatically when the temperature gets high enough: there's a temperature switch in the bottom of the radiator that controls this. The other fan is for the A/C and turns on when needed. It usually starts when the A/C is turned on and the car is not moving.
When the car is moving more than about 20kph the fans are generally not needed.
SD
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