Keep in mind that some jobs may be reluctant to hire someone who can only work 3 days a week, though.
No guarantee you will be scheduled ONLY on and ON ALL 3 of those days. Your parents are a bit insane for wanting to lease a brand new car. That could cost them a LOT of money at the end of the lease.
Apply to all retail stores you'd prefer to work for. Be prepared to advise the days/hours you'll be available.
So a little about myself: I'm 18 years old, I am a full time student, and I have three days off each week with nothing but free time. I want a job so I can have money in my pocket and my parents said if I do get a job, they well help me lease a 2014 car. So I don't want to work in any food industries because simply I dont want to work in a restaurant. I want to work in a retail store because I love electronics (which is also my major). I also like stocking up stuff, like putting things where they belong so others can find them easily. So what job should I look for? If i am too vague, let me know so I can add more info.