Kay, it sounds like you are on the right track for treatment. The chemo is pretty standard for the type of cancer he has. The surgery is also typical in the treatment.
The only thing you can do is try your best to keep him motivated and treat the symptoms of the treatment. 5FU is scary. My dad was on it and it was pretty brutal. Metallic taste in the mouth, nausea, no apetite, the whole thing.
You will encounter many problems as you go along. If he has a J tube, it will get clogged, if he doesn't feel well and won't eat/drink, he will get dehydrated. There are many menial things that make this journey so difficult. The most problematic of all, for my mom, was the loss of her "romantic" figure. She became nurse and he patient. It was hardly recognizeable as a husband and wife relationship anymore. This was after things with his condition got really bad, but nonetheless, this was the hardest part. He tried his best to keep things normal but he didn't have the energy, couldn't go out to dinner becasue he threw up every 30 mins, etc. If you think it would help, seek some counseling for yourself to head these issues off at the pass.
B