Just some approximate mileage for you:
Corolla to Kitty Hawk 25 miles
Kitty Hawk to Hatteras 62 miles
Kitty Hawk to Ocracoke 90/95 miles ... from Hatteras to Ocracoke you have to take the ferry which takes about 45 minutes. Free and interesting
Kitty Hawk to Manteo 25 miles (Roanoke island)
Roanoke island(Manteo) things to see:
North Carolina Aquarium
North Carolina Aquariums » North Carolina Aquarium on Roanoke Island
Elizabethan Gardens
Nags Head Gardens | Events Outer Banks | The Elizabethan Gardens | Visit Nags Head | Nags Head Attractions
Lost Colony Outdoor theater 8:00 P.M.
Tickets & Information | The Lost Colony Make sure you take bug spray if you go to this because it's on the sound and in the evening.
Oooops forgot to say if you do the 4 wheel drive on the beach, make sure you check when high tide is, and if the sands real soft let some of the air out of your tires.