I just got GTA yesterday, and I held up a store. When I came outside someone gave me a ride away. Is there a way for me to pay him for helping me?
There is a different way but it requires a lot of money, more than you're gonna share:
Go to LS Customs pick a car there and tune it. DON'T place insurance on it. Then, go to sell the car to see how much its worth, don't sell it, go to the closest mission, join the mission with your friend and leave (you have to host). The car will then spawn on you again so your friend can take it and sell it.