The vibration through the wheel will be wheel balance out or buckled wheels ,the squeak will prob be the release bearing I just done my clutch and put a new bearing in as well and having similar problems it sounds like u have a buggie in the box mine goes when u just touch the pedal , as for coolant check all ur hose joins for furring ( corrosion against the metal components) mine also lost water and turned out to be the rad so I put a new one in £51 delivered of ebay brand new
Hope this helps