DTM, welcome to the forum. I'm very sorry to hear about your dad. Does your mom also have a drinking problem? It would be best for her to not keep alcohol in the house and to at least not drink around your dad.
If you look at the top of the forum page, you will see a folder entitled Hepatitis Resources. There is a lot of info in there on liver disease. The throwing up of blood was probably from bleeding/ruptured esophageal varices (enlarged veins in the esophagus) and the diorientation from hepatic encephalopathy (ammonia buildup in the brain.)
Your dad's doctor has been very honest with him. If that doesn't scare him into sobriety, he will probably die from his liver disease--sooner rather than later. Drinking is the absolute worse thing he could be doing to his liver. He also needs to be on a low sodium diet, with fresh fruits and veggies, and no red meat. Is your dad a diabetic? I suspect he is, since you mentioned neuropathy. If he is diabetic, alcohol also plays havoc with his glucose levels.
It's very difficult to watch someone you care about basically killing himself. You have a lot of company here, I assure you. You will find a lot of support here. The best thing you can do is to learn what you can about liver disease. You may not be able to "fix" the problem, but you will know what to expect in the future. Has your dad ever been to AA? Would he consider going?
Again, welcome. We're glad you decided to join the forum.