As shield mentioned, with proper gas, you "can" weld aluminum. Most don't because 1 bottle of 100% argon is easier. I have never used DC on aluminum, because have always had a AC capable machine, so never been curious to buy the gas and try.
For tungsten, I like ceriated tungsten. That way I don't have to keep track when going from aluminum, stainless and steel. One type does all.
For farm type repairs on on that air cooled machine I'd stick with 1/8" tungsten too unless you start welding really thin stuff.
Another thing, I didn't see anywhere on that machine to swap from dcen to dcep (sometimes the machine does it on its own when selecting stick vs Tig mode). So assuming how you hardwire the cables, make sure it's dcen for Tig. And most stick welding is dcep