Who is at fault when you are exiting from a private driveway and you are hit by a car making a left hand turn?

Facts are not clear: "left hand turn" from where to where? In general, entering a public way from private property has to yield to everyone lawfully upon the public way. However, every person (including turning left) has obligation to observe other drivers and avoid collision if possible (the "last clear chance" doctrine). Cannot determine potential "fault" from slim facts you have provided.