This forum is loaded with tips on overhauling a vintage bike. Your Peugeot appears to need a thorough cleaning, polishing, replacement of cables and housing, and greasing/cleaning of bearings in the hubs and bottom bracket. It's all here, just recommend using google to search the topic you need.

An experienced mechanic can do all the work in 4-6 hours. Having an LBS do the work will run close to $200 + any parts.