I had no "true" Santa cloth in my library, so I used the dForce Snowflake Queen Outfit for Genesis 9 (https://www.daz3d.com/dforce-snowflake-queen-outfit-for-genesis-9) and other clothes with a red shader preset instead. Maybe it's not a very "conventionnal" Santa, but still I think he is recognizable.

For the room, I used the Christmas Condo for DAZ, but I was surprised because I didn't know that the romm itself was only one prop, that reduced the flexibility to position walls, doors, etc... That's why I set some of the room material opacity to 0, in order to hide the parts I didn't want. On the other hand, I hid the door of the room with a rug, and added a new door from the Collective3d Portrait Vignettes Old West 2 (https://www.daz3d.com/collective3d-portrait-vignettes-old-west-2) where I wanted. As the same way, I added a rescaled cube under this door to create a baseboard (cf. the two last screeshots).

I hoe you'll enjoy this rebder!