When I turn key on there is no power to anything

Apart from the obvious electrical connections, you could try checking each fuse. Sometimes they appear to be ok but 1 end of the fuse may be broken and touches intermittently. Try lightly tapping each fuse 1 at a time with the handle of a screwdriver and see if anything goes on and off.

Check battery and connections.

Will the key turn?? If not try to turn key while trying to wiggle the steering wheel back and forth, if it turns on a it still won't move either your steering knuckle is ceased up or your power steering pump is out. Make sure there is power steering fluid and you might have to drop out the pump and replace it, let me know anything further

But it will anyway be on your battery. Only two ways to power anything, your alternator or your battery. Turn your key to Accessory and anything you run on the car will be powered by the battery. When the alternator isn't turning, it doesn't produce or hold any power, so everything is powered by the battery then.
The lights, the heater blower, power windows, radio, all can run off the battery... and then drain it. Car makers are pretty lax with the radio control because a radio by itself and the speakers takes a very small amount of power to run. It's more like a trickle draw, much less than your dome light. But if you have an amp system, that's another story.

I am assuming that the starter will not crank over when you turn the key.It sounds like the starter solenoid is toast.Get a meter and see if there is power to the solenoid when you turn the key.It will be the smaller gauge wire .If you have power to the solenoid and you get no cranking then you will have to replace the starter(they are one unit)

Your radio is fused with two circuits. One circuit provides power when you turn the switch on. The other is a circuit that is on all the time so the clock keeps time, presets for the radio stations, etc... Is there anything else that doesn't work in your car? i.e. dome light, courtesy lights, etc.. anything that would be active without the key being turned on. Recheck your fuses.
Hope this helps.

check battery connections especially the ground

the key cyliner lock out will not function w/o power
put battery charger or cables on it and key should come out

Neutral safety switch on the tranny?

Remove the steering column covers and you'll find the electical switch to the ignition. You'll find a rod that activates the switch from the lock and tumbler. Check for anything broken between the two.