Brakes do not cost that much 10-15 ea. Kool-stops are about the same. Cables might be rejuvenated by squirting some oil and worked, if not as long as the housings are good can be replaced easily for another 20-25. I don't know what kind of shifters you are looking for, but they can be had used on Ebay, or by looking for a donor POS at the thrift store or Craigslist.

Try to free up the FD by soaking it in some PbBlaster, you can use it in your cables too as it is also a lube, not great but better than nothing.