What can I do about my mom?

This town has mainly family businesses, so there are only a few jobs available. In the reccession, the local factories laid people off, and it really hit hard here. That means that even now, stores and fast food restaurants are laying people off and cutting hours. This means that to earn gas, I chauffer my family around since only I have a license. My mom doesn't have a car or a license. At 6:30 in the morning, I was rudely awaked by angry people, and everyone is running all over the house trying to find the keys to MY car. I was forced to help look. I never found them. After Mom went and arranged another ride to work (even though she only works less than walking distance from here and it was a nice day), and since I had woken up more and gained a sensible train of thought, I found the keys. I had put my pants on top of a pile of stuff, and the keys slipped out of my pockets and fell to the bottom of this stuff, which everyone else had supposedly already looked through. Of course, Mom blamed me for hiding the keys. So all that day she had me go all over town, running back and forth to several places several times and even go several blocks out of my way to go see Christmas lights. The whole time the tank had less than an eigth left. I kept saying to Mom that we were about out, but she wouldn't give me the money. Later, when we got home, she said she wouldn't let me have any because I quote "hid the keys" from her. Finally, my friend offered me $10 to take him somewhere, so me and two other friends piled into the car and headed to the station. Two blocks away, the car sputtered to a halt in the middle of an intersection with an suv behind us. Oh joy. So as we pushed it the rest of the way to the station, we ran over another friend's foot, and also got attacked by the elderly. All because of Mom. She still expects me to drive her around, even though she won't get me any gas. She got me power steering fluid and fuel treatment, but won't get gas, or just give me money to get gas. What can I do about her? It's not like I can just leave her to walk, because when my dad was driving her (before I got my license) she did pretty much the same thing to him and then when he tried to stop taing her places she went around telling people lies about how much of a jerk he alledgedly is, refusing to take her places without demanding "outrageous" monetary compensation for gas. Half the town (small town, word flies) hates his guts. I don't want that happening to me.