Cheap Beginner/Weckwerf Car?

Hello Due to a move in 3 months I will also be dependent from this time on a car. It is only needed for the ride to work and back. That’s about 15 KM Easy. I never had a car and have no idea about it. On optics and so on I give nothing. I’m actually looking for something that costs as little as possible. Only unfortunately really knows nothing in the area of car purchase or what such a thing costs to control or insurance and why and at all. Or like ma n knows how expensive a car finally costs in insurance and tax. And how to find out what the real fuel consumption values are about to estimate the ca fuel costs. I would be interested in concrete car suggestions. What I imagine: Used car (no new car. Costs only unnecessarily much money) Best one can be given away when needed repair and cheaper re-purchasing (away throw car) No idea of what I still have to think about. There is certainly a thousand ko I don’t think or think of you out of inexperience. It should simply be a cheap commercial vehicle to work and back. And my wallet is unfortunately not really payable due to temporary work. And a loan is not possible for me. If the current cost would be 100 euros a month it would be great, but I don’t think this is realistic or? Thanks for your help