ALL OTHER MAKES ALL OTHER MODELS SUSPENSION NOISE

I Just Bought A 99 Explorer 4 Days Ago. I Notice That When I Put It In 4 Wheel And Turn, The Car Jerks Alot And Makes A Loud Whining Noise...

Whenever I Turn My Steering Wheel, I Hear Groaning Noises, Like An Old, Creaky Door Hinge, Coming From The Front End. What Is This Noise...