something is obviously touching rotor when you brake. Take wheel off and check by spinning rotor.
Check that the fan belt is tight.
Can you tell us little more? Does the engine squeal when the car is just sitting and idling? Or, is the squeal from the suspension .... it squeals when you're moving or turning?
replace it or tighten it
The door latch will need replaced.
it is probably the bearings going out in the ac compressor pulley or belt slippage. the reason it is different when it is on is because the belt is not under "load" or has resistance.
tighten the belt or replace it Maybe a loose power steering box or a worpted pully.
Most likely the new pulley is not in line with the rest.
Sounds like you need some more air in your tyres
spray wd40 in the clutch where the bearings are, they are probably a little rusty. do that a couple of times until noise stops, be careful not to get any on the pulley and belts.
Your blower motor is going out. Be prepared to replace it soon or it will just quit working all together.
Probably two separate conditions. Check the condensate drain line. You may need to find a diagram to see where it comes out, but generally it's on th passenger side, near the bottom of the firewall. Use something to clear out the debris and get it draining again. The squeeling of the blower motor is just an indicaiton that the bearings are "dry". Unfortunately, the only way to service the bearings is to replace the motor.
Your main bearing in the trans is going out, 4th and reverse don't use the same shaft. Get it replaced asap Note, this is common to the ax5 transmission, but is normally set off by low trans fluid.