Welcome aboard! I personally have never heard of repair for any of the gauges you asked about, not to say its not out there. I replaced mine. As far as the running lights, what is your question? Are you trying to replace bulbs, entire housings, wiring? Depending on how far you go the feedback will be different. In your running lights case my personal opinion is to replace as well, but that's me. Finding (OEM) or original style lights may be a little difficult but Im sure Ron will chime in and let you know if he has anything comparable.
Post up specific questions and youll get plenty of answers around here!!!