The smaller the engine, the cheaper it can be, to start & gain experience & Gain N.C.B, Go for the likes of a Peugeot / Fiesta / Corsa, the fuel will depend on your Daughters right foot! If she starts been a tear @rse, she will pay the price in a few ways, Insurance / Endorsements / Higher fuel costs, that will be up to her, If you intend to bye take someone with you that knows a bit about cars / Mechanics of a car / history / HPI Check etc, Do not bye off the side of the road with Mobile Nos, ( You can come unstuck) depending on your cost, make sure you get a warranty.