Celica not running - help

Alright, my Celica won't start, and I don't know why...I'm thinking maybe it's the timing belt?? It ran fine last night, but this morning when I tried to start it, it would turn over and try to start, but wouldn't, and when I let go of the key it dieseled a little and a little white smoke would puff out of the cold air intake. Does anyone have any idea what this would be? Any help is appreciated, thanks!!

white smoke comes out of the intake?

....be a little more descriptive...