I am about to buy a used Imacon 646. I tried to research but it is a bit overwhelming..
What do I need to successfully connect it to a laptop?

I have a macbook pro with OS X 10.10.5 (Yosemite) and old poor HP laptop with Windows XP. I already know first one is probably not an option. I can buy an old macbook (G4?), but I read somewhere I need some adapter for SCSI or firewire (also?), that recently got very expensive. Some people recommend to use Windows as it is less troublesome (=no need for expensive adapter?). What is your opinion? Anyone used the scanner with PC?

Is it probable it will need a service? What is the most common thing that breaks or needs adjustment at a service?

Thank you a lot in advance!