Just air out the house, and sort out the smoke damage. Probably throw out the pot. I can well imagine the damage. I once left a soup stock simmering in the morning, and asked my house mate to stop it after two hours. Before I started it, we had agreed that I would cook the stock, and he would turn it off - he couldn't smell, so I made sure he knew about anything like that. When I came home in the early evening, he was busy doping a model plane. The whole house was full of smoke, and dope fumes, and the pot had been dry for hours. You are right about the grease. His room didn't have an outside window - the window went straight into the kitchen - typical frugal student accommodation!
If there was anything toxic, you've already had a lot more of it in your lungs than you'll ever get again while it was in the smoke p so don't worry - just clean.