I used to work as a professional welder (hated it) and for automotive work a good 110v wire-feed welder with gas purge will be fine.
Resist the urge to pick up a cheap no-name welder from Harbor freight or other sources. They will only give you headaches and the feed mechanism sucks.
Stick with a Miller, lincoln, or Hobart. You want gas period. Dont let anyone talk you out of it. Flux-core sucks fat cock.
For home use I have a Millermatic 175 wich runs on 220v so I can weld thicker stuff but 110v is fine for bodywork and misc stuff.