I don't have a thermometer to check temperature or vegetables to cook on, How do I cook a turkey in the oven?

All I have is a aluminum pan, butter, and an oven bagThe turkey weighs 13.50 lbs.

Ok - if you are doing a stuffed turkey (I prefer not to use the bags) you should cook it at 325 degrees for the weight that you have - for 3 1/2 to 4 hoursIf it is not stuffed, then you should cook it at 325 degrees for 3 to 3 hours and 45 minutesIf you do not use the bag, baste often (I start out with about 1/4 inch of chicken broth in the bottom of the pan to start basting with) - cover top with foil, remove the foil about 30 minutes prior to the end of cooking time to allow to brown the top to a golden brown!!! Hope this helps!