do you have a floppy in the drive all the time? have you entered the BIOS to see what the boot order is? if yes to the first, take that out. if no to the second, then press f1 or f2 of the delete button on your keyboard and see if it will allow you in. if it's a Compaq, you might try f8 or f12.
As to the graphics, you have a couple options. There are tools online that can scan your hardware and tell you what it is, but I guess the easiest way is for you to look all over the card and get all of the partnumbers and names that you can find and post them here. if the card has a removable heat sink on the core, remove it and look there. Did it come with your computer? did you buy it?