It's common for a vehicle that's been towed over a distance to get "crud" in the engine compartment that burns off when you first drive it again. DSDP creates a big suction behind it and I imagine the exhaust is a little oily/sooty.
The Check Engine Light/Malfunction Indicator Light (CEL/MIL) is another issue. If you followed the towing rules, you shouldn't have done anything to set it off. You pulled fuses. Did you perhaps pull a wrong one, even if you put it right back? I did that once on a much older car, wasn't even OBD2, and got a CEL I couldn't re-set myself. Had to get a shop to do it.
Hopefully it drives OK and if it does, go have it scanned. Record any codes found, but again hopefully it can be re-set and doesn't come back.
