It depends on the present condition of the break pads, and how worn they are.
If your break pads need replacing I recommend having them replaced as soon as possible.
Why do brake pads squeak after replacing pads?
They need replacing when they wear out. They could wear out at 23,000 miles if you drive hard with lots of stops or ride the brake with your foot. It is not normal for them to need replacing that quickly but it all depends on how you drive.
You do not need a torque wrench when replacing brake pads and rotors. Some of the tools needed to change the rotors and pads are the c-clamp, sockets, wrench, grease, and brake cleaner.
Brake pads are the pads that sit on top of the rotor that when the brake pedal is pressed the brake pads squeeze the rotor and the car stops. Signs that they need replacing are if you hear squeaking when pressing the brake pedal.
There is no set mileage. It depends on many factors. How you drive, where you drive, and the speed at which you drive. I have seen them last 100,000 miles and I have seem some that need replacing at 20,000 miles. There is a warning device that will alert you to when they need replacing. When you hear a high pitched squeal, they need replacing. Another sign is when your master cylinder gets low of brake fluid.
If you did not open any brake lines and only replaced the pads there is no need to bleed the system.
brake shoes or pads are worn and need replacing
The brake warning light
Whenever you want to but once your brakes start squeaking that means your brake pads are low or your discs/drums are wrapped and need to be skimmed or replacing
depends on the condition od the pads. If worn or have groves etc from the rotors then replace.
You will need to push the caliper piston back as well as rotated when you are replacing your rear brake pads. The caliper will need to be turned clockwise.
"Could be many things, but from my experience, brake pads might be worn thru and are scraping metal to metal. If so brake pads need replacing. If brake pads are worn thru and not replaced, scoring damage could be accumulating on the brake disc." It could also be due to a warped or damaged router that would be the big metal disk. but if replacing your brake pads doesn't fix the problem replacing your router will more then likely take care of the noise.