Using Paypal you have several choices:
- Pay using money from an existing credit on your PayPal account (if any);
- Pay using a credit card: the amount is drawn from your credit card and sent directly to the recipient's PayPal account;
- Pay using money from a debit card/ bank account: the amount is sent directly to the recipient's PayPal account.
Please note that PayPal will probably charge you certain commissions when "uploading" money, so please check their website for more precise information about their services.
Please be extra vigilant about possible fraud sites purporting to be PayPal.