Thinking about spending Christmas In Italy ,maybe around Tuscany region

We traveled to Italy for the entrie month one December and lived there for 4 Christmases. It is a delightful time to be there with holiday decorations lighting up on December 8, the traditional start of the season, and continuing until Jan 6.

“Tuscany Region” is huge and the countryside a bit bleak in winter. True, crowds of tourists are gone, but it is definitely low season and many of the older buildings that house agriturismi are very cold and hard to heat. (I speak from a bad experience one February!). Certainly if you stay in a hotel in a town you will be comfortable. You would really have to read up on the various hill towns to see which appeal to you.

I would stay in and focus on a city for the actual holiday. Florence, Rome, and Venice are better suited to tourists spending Christmas as they will still have services (restaurants) for you. Simply walking around Rome is lovely on Christmas Day, be aware, other than restaurants, for which you must reserve, everything is closed from about noon the 24th through the 25th and as the 26th is also a holiday, expect some, closures although some sites are open. The smaller towns will have less open.

Something to be said with renting an old farm building in low season. Many years ago I got a great price on a farm house in the Valdarno valley in early April. Rent was about 40E when the euro was new so a very close exchange to the Cdn $. Heating was extra. We had a big kitchen fireplace that we used, but that didn't heat past that room, and central heat we only use for about 3 hours in the evening as the house was stone cold. That heat cost us more than the rental.
I think the advice to stay in a town is sound.

You might also want to let us know if this is your first or umpteenth time to Italy.

I spent this past Christmas in Lucca, which was lovely. Shops and museums were closed, of course, on Christmas Day, and many places are also closed on the day after Christmas. However, enough was open that I had a wonderful time just walking around, and had a lovely mid-day meal (make a reservation!!). On the day after Christmas, I day-tripped to Pistoia, which is also a lovely small town. Most shops were closed, but I saw some astounding churches and, again, a great mid-day meal. Christmas 2017 I spent in Florence, which is overall a better location on Christmas Day for finding things open.

we spent December 23-dec 28 in an Agriturismo near Pienza with our 17 and 19 year olds two years ago and loved it. I guess it depends on what you are looking for. We were glad to be able to drive around without traffic and enjoy a natural hot springs, olive oil tasting and a long one on one visit to a winery. Our agriturismo hosts were a wonderful couple and their father in law. They made reservations for us for meals on Christmas eve and Christmas day and also supplied us with fantastic home -made cheese, meats, honey and breads. We went to midnight mass in Pienza which was freezing cold! We also did a one day trip to Florence which worked out well. The weather was very good - dry and 50's or so. I am sure we could have done more, but this was the quiet portion of our trip after Rome and it worked for us.