Mori's are pretty nice so you shouldn't have any issues. We have Mori's from 1990 (mostly SL/ZL) and they are still ok.
In any case it's just a CNC lathe but your question is far too wide. If you want specific info you need to ask a specific question. 'more info' could be anything and the set of manuals for 21i series total about 4000+ pages.
The pics I found on google show it as 1996 21iT
If it were 1986 it would have to be Fanuc 10
I assume this is like your machine.....