Silly ham question

We're not big turkey people here, well DH is but he's agreed to a ham this year for Thanksgiving. 

We have a local dairy company that delivers, and they've partnered with other local businesses to deliver specialty meats for the holidays. I can get a Pork Sugar Cured Bone-In Ham, boneless ham or spiral sliced ham. The prices are reasonable, especially considering we're supporting a small local business. Plus, I'm willing to spend a bit on the holiday meal. 

Here's my question(s)
I know what I'm getting with a spiral sliced ham. that I've prepared and served before.

I assume the cured ham means it's cooked? If it's not then I would think that there would be wording included with the ham itself saying hey you need to cook this? I assume I need to heat the part we would eat for thanksgiving?

Is there benefit to bone in vs boneless with this type of ham? It's just the 4 of us, so no need for a pretty presentation. I care about how much will we have leftover and can I use that in sandwiches etc and not letting it go to waste.

thanks all, and if you're in the KC area Shatto milk is going gangbusters with the home delivery right now.