You can go the the engines themselves and do a simple search. For example in Google it would be "site:example.com your keywords". The results are not always 100% accurate, but you'll get the general idea.
I have had my website on the web for six months now and I still don't have a google page rank
PR that shows up on toolbars is highly unreliable. Google updates it infrequently, and when you do finally see it it's already well out of date. Don't worry about it.