Bell services will call you a cab and provide you with a voucher to use that you give to the cab driver as payment. There is no cost for you.
Not sure whether the bags are sent seaparately from you or not. We rented golf clubs when we did this so I don't have first hand knowledge of how they do the golf bags.
If you are going to play at more than one WDW course during your stay, Disney will store/transport your clubs from one to the other for you. Just ask for it when you complete your first round.
Oh yes, and they will also comp you cab ride back to your hotel after the round.