Ray: the price sounds acceptable for what the guy is presenting. The 6211 is tough in it's class.
As for the front tyres, why worry? Cheap to buy new ones, as they are not a funny size. With the brake/clutch master cylinder thing, just get the new ones from a
Zetor dealer. After-markets can be found, but too much fooling around. See that the parts are still wrapped in their cheesecloth and foul-smelling goo, this tends to keep them young.
When installing and bleeding, one noices the access plate on LHS foot rest . Once that's off take out the cover in bell housing (if there is one), peer in take a gander at the clutch assy. itself for reassurance. If the brake friction parts are worn out, that's a fairly big job too.
Try to forget the hourmeter everything's relative, no? Paint just like you say NO problem. Important however to examine the injection pump. Guess how much the hot-rod types have been monkeying with it. Any seat will fit the tractoru, question is will it fit you?
Service/parts
manuals are easy to get, T.Z. at Zetor Forum probably has hooked you in to El Paso. As for the books' content in terms of being useful in the field, don't get your hopes up.
Other than that, if you go for it, make sure NOT to baby it.
J.W.