Most definitely not a plasma cutter! What you have is a janky rigged OA torch hose with part of a regulator, that I would no way hook up to any kind of gas (oxyacetylene being the last gas for sure!

). I actually just got a plasma cutter from LONGEVITY Welding. Here is the picture of what it looks like:
Check them out here. If you need one, they have some really killer deals with warranty!
www.longevity-inc.com