If you select "crank" (ground?) without bleed air you will likely put elec power to a solenoid in /at the starter however without bleed air pressure the start valve wont open.This is kind of generic but what is likely the case.
Depending on the aircraft, the pack valves may close or you may need to do this manually.
Instrument / avio cooling can be aided by conditioned air but blowers are usually the primary source of cooling.
So many variables it is hard to answer with certainty.