How do I apply for a Macy's credit card if I don't have ID?

No, you cannot pay for Netflix with cash.

You can purchase a Visa gift card and put money on. Use the code from that card.

Yes.

It depends on the gas station. Some will not let you use a credit card to buy a prepaid card.

Yes, as prepaid credit cards act like regular credit cards.

You are basically transferring cash from a "permanent" card to a temporary, disposable one.

Assuming you mean you have lost your physical card, call customer service and tell them you need a new card. You should be able to find the phone number on...

To verify your identity.

If you have to close your account and open a new account, that could hurt your score a little.

Yes, they will. However, you can call and cancel the subscription; they will most likely refund your money as long as you call immediately.