The key to a moist turkey is to cook it at a low temperature (275 degrees for about 2 1/2 - 3 hours in a big pan covered very tightly in foil (this is for a large turkey, adjust time based on size. It should say on the side of the package how long to cook it). After that remove the foil, smear it all over in butter and put it in the oven uncovered at 350 degrees for the rest of the cooking time. Cooking time will vary depending on size of the turkey. It will be brown and beautiful. Also brining a turkey makes it more moist, just be sure to rinse it very thoroughly and pat it dry before cooking. Here is the Pioneer Woman's recipe.
Even if you don't want to brine you can still use this recipe. Use an oven thermometer to decide doneness.
Roasted Thanksgiving Turkey | The Pioneer Woman