So... the 4Runner isn't appreciating winter that much this year.
This sound like some crazy belt squeal to you fellas, or something else?
https://www.youtube.com/watch?v=2_NYpFaiBhQ
https://www.youtube.com/watch?v=EiyocLh8FhM
Between that... my door locks flipping out while driving (locking/unlocking repeatedly at random), my driver side door key cylinder not turning, and my brake pedal being 'stuck' on cold days until I press on it for a bit... I'll be taking a 5th gen now please!
[ it should be noted that the door lock & cylinder issue isn't year round ]