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r8.. its possible to get $3000 if you work full time. but thats if you can even find a full time job cause theres plenty of high school students applying for jobs. i recommend a restaurant of some sort because you get tips alongside your hourly wage. judging by your username, youre grade 11 so apply at fast food franchises. dont just give your resume to one restaurant tho, print like 15 and give them everywhere. i dont think it would be easy for you to find a job at retail clothing stores though.
good luck!
ps. yeah like what RevRav said, how much are you gonna spend on your new car? even if you can afford the car i doubt you can afford the insurance & gas