TIG

OK, assuming it is designed to do TIG, you need a torch, tungstens, a regulator and a gas bottle. If it is not designed to do TIG, and has no HF, I really would not bother, as you will spend some serious cash for something that probably won't work well at all. If it DOES have HF, then it probably will work. A water-cooled torch is better, but some people seem to manage with the air-cooled torches. Gas lenses cost a couple bucks more than the plain ceramic cups for the torch, but the first time you use it you will save that cost in Argon. You can get adequate shielding with the gas lenses at about half the gas flow as a plain cup.

You can't do TIG outside, any breeze will blow the Argon away. But, TIG is so clean, you actually CAN do it indoors. If this machine is engine-driven, then using it indoors sounds difficult.

Pure Tungsten electrodes are very hard to use, let the pros struggle with them. Lanthanated and Zirconated electrodes are MUCH easier to use, far more resistant to contamination and just last longer. And, when you start out, you will be contaminating the electrode every 2 minutes.

Jon