Continued battery drain and high pitched noise when car started

try disconnecting the battery and reconnecting

If you did not drain the fuel all the way or put a stabilizer in the fuel then you have gummed up lines for one thing. The other noises are not really concerning.

When you turn the key to position II, does the noise start then? This would be the fuel pump. If it is making a noticeable noise while driving, then you should get whoever fitted it to check it over. If it failed, your car would stop immediately.

Need to check the ground path on the squealing relay. A poor ground will cause this condition.

SOUNDS LIKE YOUR A/C COMPRESSOR IS DEFECTIVE. WITH HEAT ON COMPRESSOR CYCLES FOR LUBRICATION

The high pitched spinning sound you hear is the starter bendex trying to engage the flywheel. The starter may check out ok, but the bendex is turning but coming out. The starter will need replaced.

Hi Eabyrd05.
It's possible that you have a Starter or Flywheel/Flex-plate issue. Your starter Bendix may not be completely disengaging from the flywheel like it should. I would take it to a mechanic that you trust and have them pull the starter and look at both the Flywheel/Flex-plate, Starter Bendix and solenoid. Hope this helps.

fast high pitched noise? never seen or heard of this, done 100's of belts, this noise is caused by a belt being adjusted to tight, belts just break. do you have fuel pressure, what engine do u have?

THE ALTERNATOR CAN GO OUT DUE TO A WEAK OR BAD BATTERY CAUSING IT TO OVERCHARGE TRYING TO KEEP UP WITH DEMAND ON THE ELECTRICAL SYSTEM. IT WILL HAVE A HIGH PITCH NOISE WHILE CHARGING AT A HIGH RATE AND FINALLY IT TO WILL GO BAD.

HAVE THE BATTERY TESTED AND CHECK THE CHARGE RATE AT THE ALTERNATOR AND AT THE BATTERY.

When your solenoid receives a voltage signal from the ignition you can hear a "click" when it engages. If your engine turns over like it wants to start or you hear a clicking or a buzzing under the hood your starter works. If you turn your lights on after starting and they work it's not electrical at all. If you try to start it and you hear a high pitch whining type of noise and then your battery dies, then the teeth on your flywheel are gone.  The starter will just spin there and it will drain your battery with a quickness.