Dry rubber sponges remove smoke well-without noxious fumes.Then a coat or three of paint will be necessary. 3000 square feet will take 4 people a week to complete. The paint will mask some of the odor. Try incense for the rest. As for the stone on the fireplace there is a product from saver systems that will take care of mild smoke residue, but it may need something more than that. If it does, you will need to vacate the residents for a day. Then you cover the area with heavy plastic sheeting, set up a fan system for fume elimination and break out the industrial strength masonry cleaner/acid available at your local hardware store. DO NOT attempt to fix your own fireplace! Do it yourselfers beware, this is not your realm. One chimney fire is enough, the second one may be YOUR last. There are liners and retrofits for this but improper installation can be more perilous than leaving it unattended. Call a certified chimney sweep for an evaluation and let them perform the necessary repairs. I can’t delight in a fireplace if I’m worried about a slow or quick moving fire escaping from it while I sleep.

The stone fireplace can be cleaned with a mixture 50% bleach and 50% water. Place in a spray bottle and spray on the soot. You won’t have to wipe much if any but have some ancient rags handy.

My guess on the walls would be to wash down, coat with “Kilz” and paint.