So you have your site template designed, its great looking and has a search engine friendly design. The two main questions you may have now are, one, how much content will I need, and two, how many pages?
First of all, your content will have to be relevant and contain useable information for your viewers. You do not want to create doorway pages for your site. You want to have good quality pages, give the users the information that they want. If they do not find the information on your site, they will go back to the results and go to the next listing. This is what we want to avoid!