If you want left overs, you need 1 1/2 pounds per person, so for 10 people that's a 15 pound turkey. If you are making stuffing, make about 15 cups.
If you don't want left overs, you need 1 pound per person, so for 10 peole that's a 10 pound turkey. If you want to make stuffing, make about 10 cups.
I'm a fan of buying 2 smaller turkeys instead of 1 big one. The smaller ones cook faster, and there is twice the legs, wings and thighs for those who like that.
I don't do anything fancy for veggies. Just plain mashed/whipped potatoes with salt, pepper, butter, some sour cream and milk. Gravy. A couple of steamed veggies like carrots and broccoli or cauliflower. Salad. Dinner roll.
You can also make cabbage rolls if you are ambitious, or even buy some at a Ukranian restaurant.
I know some people like to make sweet and sour meatballs too.
But it's my experience that people tend to way over cook for the holidays and make way more food than they need or can eat, even with left overs, and most do it because they feel they "have" to: which isn't the case
Oh, and don't forget dessert! A nice cheesecake for those who want something heavy and something light like a fruit/pudding dessert for those who want something lighter.
So far as cooking, cook on a lower temperature of 325 degrees. If you are stuffing the turkey cook for 4 to 4 1/2 hours for a 15 pound turkey. 3 to 3 1/2 hours if you aren't stuffing it.
Here is a great site to help you plan your turkey menu:http://www.butterball.com