Basically it is certifying that any CC stuff you do is secure, and that you keep nor store any card numbers, etc. If you do ecommerce there are additional questions regarding how your site processes the cards etc. I do not think you have to mess with PCI compliance if you use only PayPal and possibly Quickbooks card processing.
I just do a quick 5 minute thing on the web each year to recertify. If we dont do it our rate will jump by a couple of points. Have to do it every year to keep the processing rates down.
Easiest is just to tell them that you only accept cards in person on a machine connected to a phone line. That pretty much stops the questionaire on one page. If you tell it you take cards over the phone or if you enter cards into a computer (processing through a mechants site or ecommerce) in any way then you get hit with a lot more questions about dealing with the customers card numbers.