Sounds like the imfamous ignition switch. Not the one your key goes into, but it's inside the steering colum on the bottom side, easy to replace, little black box looking thing.
Your key being stuck....some models have a punched hole under the key igntion. Push the button and release the key. Those where the hole isn't there- there is an etched circle of where the hole should of been, drill this plastic out and push the button.
You're on the right track for the blower motor resistor. If it's melted, replace the resistor connector pigtail.....I just replaced this entire assembly for my neighbors TB, very easy. Luckily on my personal TB, mine didn't melt so was lucky.