I just bought a new 2008 Toyota 4Runner less than 1 month ago and I'm having a little problem with the car. Can anyone tell me if they hear a noise or a sound like psst every time they brake. Also, can anyone tell whether their brake vibrate or has a pulsating feel every time they brake. I don't think that this is normal, even though Toyota is telling me that it is. Thanks in advance for your responses.

I guess the sound is coming from your disc brake.When putting on your brake the disc pad and and rotor are rubbing and makes a sound. Check if your front tire's air are balanced.Sometimes it wiggle and vibrate if they are not balance.When you are on the freeway try to feel your steering wheel if it pulls to the left or to the right.If your front tire are balanced maybe your tie rod end.
I hope this help.