OP, Short answer: If store-bought self basting turkey (label says 'contain X% salt solution of blah blah blah), remove giblets and neck from body cavities, pat bird dry with paper towels. Salt and pepper inside and out, and brush with oil, put bird in a 325 oven at 6am, breast down., Around 10 am, remove bird, and flip bird (breast up) and tent breast area with foil, put back in oven. Pull it at 11:30. Let it rest (tented with foil), and carve at noon-ish. More/better info below.
I was gonna say you need about 4.5 hours at 325 for a bird that big. If it's a self-basting bird (says something like "contains a 8% solution of salt, blah blah blah"), then you can't brine it, but you can rub it with butter and seasoning on the outside, and stick some butter and seasoning under the skin. Don't stuff it. Stick a quartered apple and onion, a stick of celery, and a few carrots in the cavity. Stick it in a roaster pan, on a rack, breast side down for the first 2.5 hours or so. With an hour or 90 mins to go, get it out, flip it, breast side up (baste it while you're at it). Tent the breast area with foil, and back in the oven for the last hour or 90mins. Remove from oven, cover with foil for 20 mins before carving. you'll be ok. Total time is maybe 4.5 hours, plus 10-20 mins prep time max. You can cut an hour off of that with a high-temp roast method. (do 425 for first hour, reduce temp to 300 for 2 hours, and you're good. Watch it the first hour, so it doesn't get too brown on outside. Put foil on if burning. Google is your friend, but I've had good luck doing this with cheap, self-basting frozen turkeys with nothing added. Do a lot for company christmas parties (100+ people) and they like them).