The ac compressor is probably seized up or seizing up. Don't run the ac any more until the system is repaired. If the compressor fills the system with trash (if it hasn't already) the cost for repair will be very high.
Sound is a vibration travelling through the air. When it hits foam, it causes the foam to vibrate, which in turn causes friction. The friction causes heat.
Sounds like your belt may be worn out.
electrical interference
That is the normal sound of the pressure equalizing in the system.
the clicking sound is the blinker. when you signal to turn with your blinker the light flashes and makes a clicking sound.
You may have a wheel bearing on it's way out.
Could be a worn CV joint
It sounds to me like you have wiring problems.
There is a good chance your rotors have been worn too thin, which in turn causes the crunching/grinding sound when stopping
an ambulance
If it does it when you turn the key and the engine does not turn over, it is a weak battery or possibly a loose connection on the cables.
Often, you will hear a popping or clicking sound when you are in a turn.