For what length of time can a person live with liver and kidney failure and they are really bright yellow?

Failure of organs. The person you are describing is clearly very, very sick. He appears to have jaundice due to his bilirubin being elevated with is seen in liver disease caused by many different etiologies. If he has kidney failure, this may be due acute kidney failure caused by hypotension or a less common fatal condition called hepato-renal syndrome. Ask the patient's doctors for more information.