growlatt

hi `im a uk citizen coming to u.s in the new year , can someone please advise me on these points...firstly how do i obtain,and is it fairly straight forward to get a visa for 6 months. the next question is i would like to buy a car whilst i am there for the duration how do i go about this as in insurence and registraion ect... the next is i would like to work whilst i`m there but i feel getting a temporary work permit may be difficult as i am travelling all over, and no certain employee, is this the case or is there a way i can go about obtaining work in different states..
ok one last question are there any good websites on this kind of advice I am after..
many thanks in advance
gary