If your question is how long does it take to prepare a turkey for the oven, the answer is whether the turkey is frozen or thawed. Frozen will take days or hours to thaw before it can be prepared to cook. I thaw my turkey in a pot of water over night, some people prefer to thaw it in the fridge which will take days to thaw. Once thawed it may take a half to an hour to clean, season and secure into the roasting pan.
I cook my thawed (never cook a frozen turkey) turkey for about 20 minutes per pound at 325 degrees. Most turkeys have instructions on the package. Takes a bit longer if it is stuffed. The easiest thing to do is buy a turkey with a little thermometer that pops out of the turkey when it's done. Be sure to let it cool for 20 minutes before you cut it; if you cut it sooner, the juice will still be bubbling around and flow from the cut and your turkey will be dry.
Man, it's not thanksgiving, it's Christmas! Why do you need turkey. But if it's a legit reason, then: As a general rule you should cook your thawed turkey at 350 degrees for 20 minutes per pound of turkey that you have. If your turkey is frozen this time could double.