Harmonic balancer and wrecked lower timing cover

End of the crank where the balancer bolts on

 

I had a balancer fly off my turbo car mid pull and still drove it home, mind you i was shitting my pants the whole 30 minute drive bad to my house running off of purely battery power. I would go yo a junkyard and grab a new one. The groove for the keyway looks a little mangled on yours.

 

The crank looks reuseable. The timing marks may not be correct because the key slot has been widened out, but you can compensate for that. It is the bolt being properly tightened (clearly someone failed there) that holds it on, not the key.

Replace the pulley in any case.

Don't drive with the pulley off because then there is nothing holding the timing belt on.

 

A close up picture of the crankshaft pulley key slot is required to know how screwed or not you are.

 

so all of that flew off and you still ran the car?