Tech found compressor unable to start and going into overload due to a failed capacitor. Tech also found a worn contactor, corroded evaporator coil, rust in drain pan, water damage in air handler, dirty evaporator coil and blower motor. Tech recommends replacing unit due to age, condition and type of refrigerant and frequent drain clogs due to rusty coils. Tech also made customer aware of the importance of maintenance. Customer only wanted to replace capacitor at this time. Field supervisor notified