Bad home situation help?

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I'm 18 and I have a single friend that said he'd let me stay with him, however my parents said if I do that, they wouldn't let me use the car, would take me off insurance, and turn off my phone service.
I don't even really care about the phone service part but I'm trying to maintain a full time job and I NEED a car to get there. Live in a small town where there aren't buses or taxis, and there's no way I'm paying uber every day to go to work (not to mention they could show up late or charge absurd amounts).
At this point I'm thinking about just killing myself, that's what they're leading me to. Even if I bought my own car, I won't have insurance and couldn't afford it. I have to repeat senior year again too (hopefully just half a year) so I can't just continue working. If they do this, it's gonna screw up the rest of my life. I don't even know what I'm asking, just help or advice to convince them to let me use the car (which if I don't use it, no one else needs it so it'll just sit in the garage).