not worth it at all, you'll need £4000 for the car, at least £1500 for insurance for which you'll get no NCB, then you must pay for servicing, MOT, Tax and fuel. then think about stuff like, if your at work/college you gotta get dinner (costs me £5 a day which dosent sound alot but thats £25 a week) then pay board (if you dont have to then your very lucky) then you will want money to be able to go out and buy things like new clothes. at 16/17 its very hard to get paid enough to cover all this so you'll need a very good full time job, when you do a driving lesson you will realise you don't need a turbo car first. i came close to getting a GT Turbo a few months ago but it takes at least a year to be a confident driver during which time you won't be able to drive fast safely anyway