Congratulations on your move! Glad you were able to narrow it down, you've picked a great location.
In order to register your car you have to go to the courthouse in G-town to pay the taxes (like the others have said, amount depends on the year/type of car). Then you have to head over to the DMV to register the car... make sure you have adequate ID & insurance cards. Everyone was quite helpful and it did not take long at all. The DMV in G-town is pretty quick, too.
DMV - Georgetown Location
214 Ridge Street
Georgetown , SC 29440
Phone: 843-527-8730
M-F Hours: 8:30-5:00
Saturday Hours: Not Open
Dealer Central: No
Driver License Issuing: Yes
CDL Issuing: Yes
Motorcycle License Issuing: Yes
IFTA/IRP: No