Add PayPal gateway to a site

Hi, I used Joomla! to build a site to sell just one single book (or, perhaps, also its e-book version). I want to endow that site with a Paypal gateway that lets clients pay by credit card through Paypal, even if they do not have a Paypal account and do not intend to have one. The gateway should be so arranged that the the buyers can downlad a printable invoice as soon as the Paypal payment is done. The procedure should return the shipping address and the billing address of the customers to the site owner so that shipment can be made. Also, it should make allowance for discount coupons, international shipping charges and taxes. I learn that much of these facilities are inbuilt in Paypal, or are accessible from it for free once you subscribe. That's OK to me. However, I could also consider buying a Joomla! module, such as "ccInvoices", if that is necessary to obtain a better result. What I am looking for is quite standard in e-commerce. However I need an expert that can implement it correctly in my site . Thank you very much for your attention. Andreas