Can I take a quest and have them pay for their own purchases. If yes, what cards do you accept?

Yes, they can enter with you. No, they cannot pay for their own items. The member must be the one to complete the transaction.

Yes there can be two transactions you just have to tell them, and if they say no you can ask to talk to the manager, that's what they told me, by some of them are not as nice to do two transactions

You have to tell them to hit subtotal and then you know how much they pay you, but it cannot be 2 transactions.. it must be one transaction

Yes, they just need to enter with you.