You have beautiful woodwork! The windows in our house couldn't be saved , but they did replace them with really nice windows with white divider thingies in them (lol I don't know what it's called!) so they look older.
Your doors look like they match the doors in my parents' cabin! I've attached a picture from a couple of summers ago when my mom and I spent a full 10 hours trying to remove layers upon layers upon layers of wallpaper
We would scrape and scrape and only get an inch off, and we scored it and used chemicals and everything! After this point, they just bought some cheap wood panelling, put that on the walls, and painted it.