Do yourself a big favor and use a different machine.
The NIC is probably not supported out of the box in Lucid and the graphics adapter as well. To top it of, that thing sounds like a power-usage monster. You'd be much better (and cheaper in the medium run) off with any kind of i3-i5 PC that's 4-5 years old.
If you DO want to use the machine, check where you can get network drivers for your NIC, and install then during the main installation step. During install I would add extra supported graphics adapter, like an older PCI nvidia card into the mic.You will probably not run the system as a hybrid, but as core only so the graphics card is only needed during initial install.
But again: Save yourself grief, stress and money, and get a different box, as bad as that might sound. Sometimes throwing away a perfectly working machine like that is the better option.