Is chemo still and option and what are the chances of my Dads survival?

My father has stage four renal cell carcinoma. After a radical nephrectomy, it spread to his arm bone, liver and lungs. In a few months it has grown and become very aggressive. He is currently in the hospital because he was having a very difficult time breathing. His skin and the whites of his eyes turned yellow. He is in constant pain, sleeps all the time, is to weak to reposition himself in bed. He has had four blood transfusions while in the hospital, he is being treated as a diabetic with insulin shots. He is on oxygen. His doctor was going to put a shunt in his liver to on block a blockage but after his ultrasound they found that his liver was just full of tumors. He tried a chemo therapy a few months ago that made him ery sick, and now his doctor wants to start another chemo treatment. I never get to see his doctors, they are either in the hospital too early or too late to see. My dad is confused and has a difficult time remebering things. I want to know what are chances that he can survive this? And if he can't why should he try more chemo that is going to make him sicker?? I need answers PLEASE! I just can' stand to see him suffer anymore.