Hi. I can try to help.
Paypal is an online account that you can send and receive money from. Either by registering a credit card and/or bank account.
I have an account using both. You can transfer money into the account and use it as necessary or you can transfer money from the bank or credit card as needed to pay for something. If you are doing reward points and cash out for Paypal, you can then transfer it to your own bank account (no fee) or I believe they will send you a check (for a charge of course).
There is no fee to have an account with them as long as you keep it a personal account. Some people set up business accounts to accept credit cards. That is used for stuff like on Ebay etc.
If you have any more questions, please ask.
Tamie