Can I use WordPress for company and product sales websites?

Iam sorry but Im new with wordpress. I see that wordpress is excellent for blogs, but can I use the templates for regular websites (company and catalogy websites)? Can I choose a page not to have the comments post layout and just be a regular page when I get a template? Can I create navegation tabs such as, home, about us, services on every template? Can I have paypal options on my website. Im not looking for a blog website, but I know that wordpress has an excellent admin and features. So can I use wordpress for other things besides blog?