Can I use credit card in store?

I want to purchase an example from the clickteam store but it's only showing me the option to pay with pay pal. How do i pay with my cc?

Pal Pal is way more secure that CC. Set up an account and it will use your CC for payments. The advantage of Pay Pal is that numerous sites haven't got your stored CC details.

I already have pp but no money in it and no money in bank only cc.

Yep that's how it works, Pay Pal is just avenue for using your credit in your credit card :) Just add your CC details to Pay Pal.