the brake could be as easy as replace the fluid or expensive like master cylinder worn, new disc, new pads, fluid, new brake line, etc...
the clutch might be just the spings are sacked out, or something is broke, or basket is worn... from 50$ to +500$ expected i assume...
the kickstarter could be just missing and waiting for a new one, or crankcase is broken and is just a way to hidden the damage...
you have to be more specific... it could be a great deal, if the damage is small, and of course, you could repair it yourself if you have tools, time and skill...