Any idea how long it'* been since it'* run?
Your IAC valve might be sticky/dead. It'* located in the throttle body, and controls the flow of air into the engine at idle. If it'* stuck closed, you have to keep your foot on the gas manually to keep it from stalling. A search of "IAC" and "clean" will tell you all about that.
Could also possibly be a bad MAF sensor. That'* also on the TB, the rather large plastic rectangle with three screws and an electrical plug. I've never done it, but I'm told that if you unplug the MAF while running, it will run better if the MAF is bad. Or maybe you unplug it, then start it...? Hopefully someone who has done it will respond with the correct procedure for that.
I'm sure there'* other possibilities, but those are the first two that come to mind.
If it runs, you got the crank sensor right, anyway. Make sure it'* tight, and move on.
Keep at it, you'll get it going.