If You have paid insurance you can pay "Excise tax". It is paid at municipal office and it costs cca 6% of the price of the car. After this You can make registration at Bureau Of Motor Vehicles. Registration costed other $23. You will get a Licence Plate with marked valid month and year, which you have to put on your car. After this if you did not buy a car with valid sticker you should pass the State Inspection.