Hello and welcome, I have an old white model K5, badged Woodmen, made in 1979 still going strong and ideal for the smaller workshop, and projects I find, and still capable of good and accurate work.
My Father had one just the same as you'rs, I used it a lot!
There were several versions of these machines and apparently a customer could buy, say the saw bench and add the planer or spindle moulder and all the other bits later.
These were very well made and many are still going strong today, here in GB.
Neglect, sometimes in a damp cellar or shed is the biggest problem, but they are fairly easy to restore.
Spares are very thin on the ground, but nothing seems to go wrong, any bearings, planer blades or belts are available, which would be about all you may need.
I see you're particular one comes complete with spindle block and some cutters, and also some paperwork.
This tooling can be expensive here, although I see that the 78x20x40 gold block was reduced to £60. or so for the older models recently.
Euro cutters with the pins seem commonest cutters for these KITY blocks, and on mine, in the 40mm size are on flebay very cheap, and safer to set up and use, BUT, Be wary of the spindle moulder, they can bite!
I would suggest you get some form of extractor system pretty smartish and off you go,
Do please let us know if you get it.
HTH Regards Rodders