Q: New brakes and rotors squeaking

From the description provided, it would be extremely difficult to assist this situation with your 4Runner without being with the vehicle in person. Brakes are a big safety concern and should be addressed sooner rather than later. It is very possible that damage was done after the brakes were installed incorrectly to a number of different components. It was mentioned that after installing these pads incorrectly, the damaged parts were replaced with brand new pads and rotors, and that you are still experiencing noise and grinding sounds with your Toyota. Check the new rotors to make sure that they are exactly the same as the old rotors, as even a slight size difference could result in noise from the rotor contacting something. If the rotor is sized properly, and everything else looks ok, then it sounds like there is something else going on. Since the brakes are such an important safety system, I would recommend not driving your car until you’re able to have a certified mechanic stop by and inspect the braking system on your 4Runner. This will be the safest and quickest way to determine if the brakes are properly installed and locate the source of the grinding and squeaking you are now experiencing.