For PayPal, you must provide your credit or debit card information. Do not be scared or discouraged. PayPal keeps your personal and card information safe and secure. It may be one of the most safest ways to exchange funds.
During the making of your eBay account, there will be an opportunity to link your PayPal to your eBay. By this, it will give you the money for your sold merchandise(s). It is, unfortunately, the only way to receive payment from your buyers in order to prevent fraud.