If you really want to know how much memory you have, use this program:
http://www.cpuid.com/cpuz.php
There's a tab in there that'll tell you how much you have. I'm betting it's two 512 MB sticks. A 1 gig kit has 1GB total.
If you want information about your onboard graphics you'll have to use Everest. The new versions are not shareware, however, you can use oldversion.com to get a free version with almost the same functionality.
http://www.oldversion.com/program.php?n=everesthome
So...if you rubbed the goo off to read the top of the processor, you really need to put new stuff on. It allows the heatsink to make good contact with the processor. The Arctic Silver 5 tubes are dirt cheap and are worth it.
http://www.svc.com/as5-3g.html