by running lights i assume you mean your headlights? if so check your fuses in the engine bay you may find them blown
is your mk3 turbo?
have you run a diagnostic? check the faq's for the "how to" on diagnostics
your temperature... this may or may not be an expensive exercise... first i would check you don't have air bubbles in your water system... when you start your car cold does it gurgle in the dashboard?
it could be your clutch fan on its way out, could be just a crook temp sensor
does it jump around quickly or gradually climb and drop?
answer these first and i'll continue
