Normally, you do just replace the oil with the amount that can be drained out of the old compressor. If you have evidence that yours was leaking a lot of oil along with refrigerant, you can increase that amount.
To be more specific, here'* the actual instruction from the FSM:
Remove the compressor and drain the oil. Measure the oil removed. Drain the oil from the new compressor. If more than 30 ml (1 fl.oz.) is drained from the compressor being replaced, install that amount of clean oil back into the new compressor. If less than 30 ml (1 fl. oz.) is drained from the old compressor, add 60 ml (2 fl. oz.) of clean oil to the new compressor.
As far as the oil type, you use PAG refrigerant oil. I am not sure what you mean by 150.
You should not have to turn the compressor by hand to get the oil in as 1 fl. oz. is not that much, but you can if needed.
You are safe to drive the car without any refrigerant as long as there is PAG oil in the compressor. It will not cycle without a proper charge.
Mike: 1997 SE w/ 183K, aka White Horse
, Gutted Airbox w/K&N, drilled 180* t-stat, tint all around, clear corners w/SilverStars, "PONTIAC" light up tail, PEMs, NGK TR55s