graphic card questions...?

Your motherboard has neither an AGP or PCI-Express slot. That means your only alternative is a PCI graphics card. PCI graphics cards aren't the best in the world because they're sorely limited because they have to run in a standard PCI slot - but it'll certainly be a strong improvement over the integrated graphics your computer ships with. Hope this helps.

It depends mostly on your motherboard. If it's preassembled, google your computer's model # and click around looking for your motherboard's model #. Once you find that, you can find its features and it should tell you what it has. Most graphics cards are using PCI-E these days because you get more performance and power out of it.