Welcome to SaleHoo and congratulations on your new store :)
Your store is set up to accept credit cards VIA PayPal. Credit cards cannot be set, but you can enable PayPal among the payment options, and you can accept credit card payments thru PayPal.
To set the Payment options, once logged in to your site as Admin, please click on Settings, Store Settings. Then click on Payment. The list of Payment Methods that you can set to ENABLE, are
1 Bank Transfer
2 Cheque / Money Order
3 Cash On Delivery
4 PayPal Disabled
5 PayPal Direct Checkout
To set Paypal details, click on Paypal, and fill in the PayPal email address, Status to enable. Once a customer purchases an item from your store, he/she can use credit cards to send payment thru Paypal, which will then gets credited to your PayPal account.
Hope this helps :)