Not sure what the MM135 is. MIG I assume. 110V? Have to scratch start the TIG and no remote heat control? I've seen experienced guys weld chassis stuff with an old Lincoln tombstone and a TIG torch with the gas control on it and it didn't work badly, but I would not recommend trying to do chassis work with your set up.

I've seen cheapo Chinese wire that was so contaminated and bad, all it did was make a mess. Buy good wire. US made if possible.