How long will prius crank if no start is detected?

Swapped a replacement engine. I think the hybrid battery might be low.
Go to start it, all I get is a clunk and nothing. Won't even turn over.
If the engine had been sitting a while, could it need rotated by hand to free anything up?
I've asked 2 dealers how much it would cost to have the hybrid battery charged, but they all keep telling me "the 12v battery starts the car" which isn't correct.
So my question is, say you took the injectors and plugs out, how long would it try to rotate it before stopping?