That is an overview of the capability of the chipset in your graphics card.
You would need the next generation cards with R200 chipsets in such as an 8500 for AA and AF but they will be terrible slow. The 7500 is not wanting to be rude ancient.
Can you not find £30 or £40 for a modern low end graphics card or even an older xt850 or Nvidas equivlant they are so much faster they will make your nipples spin.
I assume though that you will only have an AGP x 1 socket so you would have to check for compatibility.