I want to put together a family tree and I don't know how to find relatives on my father's and mother's side. Is there a site I can go to and look up the parent's of my parent's and so on and so on?

The answer is dependent upon the place and time period. A small portion of genealogy records are available online, a larger portion are only available via the "old fashioned" route (libraries, archives, etc.). The chances of finding a website that already has your family tree laid out for you are slim. There are websites that will help you climb your family tree by offering records online but again they are dependent upon place & time (where are you looking and when?). Your best bet would be to first familiarize yourself with how to climb your family tree, then start climbing. On OntarioGenWeb we offer dozens of articles showing what genealogy records are available for what year and what place, as well as how to access these records. We also offer a Beginner's Guide and a Beginning Your Ontario Research guide.