Last time, they took something from Cole, but Cole also took something from them and he is now enjoying it. However, it seem that the gang won't leave Cole alone as they are now chasing him. Cole know that he needs to fight them.
The car will drive on its own, you just need to focus on aiming your gun at the enemies. You'll be making friends as you make some progress, which means that your team will be stronger. You earn money on every kill and you can use it to buy upgrades for your team. Try to up your level because that will make your car stronger.