iv had a quick scan and it looks like some people are using some form of fanuc with your setup so im optomistic that you should be able to use other cad/cam packages to create your code if the need arises (without the need for the usb... i dont think the one you have linked would work for cnc...it takes an exotic bit of hardware/sofware to cnc through usb)
you need a Parallel Port/printer port (old computer that has one or add a pci Parallel Port card to your pc if its not got one)

if your dad gets to use it you can twist his arm to cough up for some tooling :)
(ebay/china)pack of 3.175mm carbide single flutes and a couple of 6mm carbide single flute cutters will see you through most general machining adventures