|IGP = Integrated Graphics Processor. In other words, onboard video that's built into the motherboard.|
Based on response # 14, this is what you probably have:
motherboard - Biostar P4M80P (P4M80P-M4?)
IGP - VIA S3 UniChrome
memory - 1GB
The following is most likely your board. The VIA S3 sucks for gaming but your board also has an AGP slot for a video card upgrade. Just about any card is better than the S3 IGP.
If you're in the US, here's a cheap Geforce 6200, $28 w/free shipping: