Earned income is gross income. (line 1)
Loans taken out in her name are included as her supplying that amount towards her own support. (line 1)
Travel expenses would count, but not the entire purchase price of the car. List what she paid for the car on line 3.
https://apps.irs.gov/app/vita/content/globalmedia/teacher/worksheet_for_determining_support_4012.pdf
