I very much doubt this machine or more specific the control system can handle 3D machining. It will be mainly geared round 2D cutting IE: Cabinets, doors etc.
If so then your into either control software upgrade which I very much doubt exists and if it does then it will probably cost more than the machine OR a new more modern control system.! This machine will possibly use bespoke electronics that require you use a certain make of control, namely there own or modified version of someone else's.?
I very much doubt one is available and therefore why it's for sale.?
The other option is to do a conversion and run it from controller like Mach3 or Linux CNC but thats involved and not something I'd recommend an inexperienced user takes on.!

Also Like the others I suspect it will be 3 phase but if not then it's still going to require a very large circuit all of it's own that your property doesn't have now.?