The TC-22A was top of the line when it came out in 1998. They were excellent machines but it is hard to say how it was run and maintained for the last 22 years. They were usually run hard and not maintained very well with a few exceptions here and there. The tool changer is twin arm style with side mount magazine. More complex than the standard type drum style. Are you good at troubleshooting and repairs? What is parts and service availability like in your area? Once you've got all of the service issues (likely) sorted it could be a nice machine for you.
Brother control is different but very simple. Many of my clients prefer it over other popular controls. You can learn the basics in a few hours. Load tools and programs, set work and tool offsets, run.... The 22A can be run in G code mode or conversational mode. A00 control. I would not want anything earlier. A00 came out around 1998. Fusion can be used to program 22A in G code mode only. Limited memory so no 'adaptive' tool paths for roughing. Programs get too large for the limited memory. I avoid the conversational like the plague... Can your local Brother support answer these questions for you?
The Brothers I did service work on in the mid to late 80s were proprietary conversational programming only. Very limited on motion capability for anything other than facing cuts or the simplest of linear shapes.
Yes. We installed on those. Blum can quote I think. Use Brother Auto tool setting function. Have to turn on Soft Switch 1, bit 1 or 2 from right as I recall. Then Auto Measure function appears at bottom of MDI screen.