Emergency New Car

My mother's car is breaking down, but she isn't capable of buying a new one. We get a little less than 300$ biweekly, so it's already pretty hard just to survive off of that. Not only does my mom need it, but I need one too.I can't take a driver's test with a car that's in that bad of shape let alone drive it. So can anyone please help me out here? It would be very much appreciated. Thank you for reading.