Oh dear! Apart from the problems you have outlined is the possibility that the focussing mechanism has been dismantled in the past and not put back in the same (correct) position. As I understand it from diagrams the focussing method has gearing with which can be re-assembled in an innacurate position which will show up as out of focus images.
Looking at it from another direction. Unless the lenses are really badly scratched, the sharpness will not be affected to any severe degree, so what you will most probably find are a slight haziness alongside sharp edges, very much on the lines of a soft focus filter. The sharp line will still be there, but just softer focus, not out of focus. I have seen professionally used press lenses that were so badly scratched you could almost use them for a ground glass screen, but they still worked OK.
As well as the other problems, I think you have what is called in the trade as a 'lemon'.