You have a real classic there. All the parts are original except for front derailleur and saddle. All the parts should perform just fine after a cleaning and lube. The brake cables and gear cables should be replaced.

Really your bike needs a good cleaning and overhaul. If you know someone that is into bikes and could assist you in cleaning and greasing, that would be a big plus. If not, spending a couple hundred dollars at a bike shop that knows vintage bikes would be a good investment. As it sits now you could get at least $200. Being in Seattle maybe much more. All fixed up $400.

Your friend is a good friend!