Yeah what dad said. But when your adjusting the throttle trim the car has to be on so you can see what its doing. I suggest putting the car on something so the wheels arent touching the ground. Like sitting it on a box but so the wheels hang freely. Since it IS a Brushless and you do this, it might get really loud and the tires might even balloon but just stick with it and try to adjust the throttle.

If that doesnt work I would turn it off and come back here and tell us what happened when you tried trimming the throttle. Dont forget to turn on the radio/Transmitter also. These cars arent like the Toy grade ones where you just turn the car on and everything works. Takes alot of maintenance and cash.