I'd quickly find my brass hybrid TTT-6 from BLI, my Q2, also from BLI, and my Duplex T1, also from BLI. The rest would have to cross their fingers. If I could manage it, I would also include my Lionel Challenger...it is a rarity now and a really solid performer. So, a four box grab and up the stairs I'd go.
Truthfully, though, I'd first make sure the wife had her purse and car keys and make her wait outside. Then I'd drag a garden hose inside and try to battle the flames, ensuring I had a clear retreat lane, even with wife helping to drag me out.
But I would not try to be a hero. Fires are nasty events. I have insurance and would be able to replace most engines. Not the T1...easily.
-Crandell