To MIG or not to MIG, that is the question

Being a total newbie on car restoration, I did not even know what type of welding technique I would need. And then I found attached schematic. It provides info on whether you can start soldering or welding and if you need a MIG or Arc welding machine.

Also check this link to video lessons on MIG welding: http://www.expertvillage.com/interviews/mig-welding.htm