some help with a futaba 4yf 2.4 ghz radio

[REV73]

Hey everyone, Santa came a bit late to me, but it was worth the wait. He brought me the futaba 4yf 2.4ghz 4 channel radio. This is my first time using a 4 channel radio and I am going to be putting it in my king hauler which I got last year. my question is this, the manual is geared towards someone using it as an airplane radio. so which channels are for the steering servo, shifting servo, and the esc??? and is there any way to change the throttle stick so that is returns to neutral as opposed to staying in whatever position it is left at?? I foresee losing control of the truck because for 25 years I have just let go of the throttle to decrease speed. any suggestions would be good.