Got a new car

Hey I just got a mkiii and there are a few problems with it but it was cheap so I couldnt say no. So I was just wondering if these problems are going to be an easy fix. First the running lights dont work(I dont know if its just wiring or what). Next it has a hot start problem this is what I am most woried about it will die after I start it when it is hot for a couple tries and I have to keep the revs up myself for a couple seconds. And temp gauge is really messed up it will go all the way up and then go half way. How complicated can these problems be.