iPhone 4 question

Will apple replace an iPhone (out of warranty) with a broken glass panel in the back and possibly some water damage. I am positive that there is also hard rive and mother board, and battery problems it won't come on and the back glass is broke. Will apple be able to replace and how much would it cost. And when it did work the flashlight would flicker high and low and would be really hot and the screen would be blank or would have black or white lines through it.