codfish5,
If you want to verify your PayPal account, the easiest method is link both a bank account and credit card.
Yes, you can link more than one credit card however, you can only use one at a time and it won't lift your limits. Normally credit cards are used for an alternative funding source during the checkout process. Your main funding source is your PayPal Account balance, if funds are insufficient, then PayPal will withdraw the payment funds from your bank account. During the checkout process you do have the option to use a backup source which is your credit card to pay for your purchase.
