There is no use for the goods mentioned aside from trade / sale. I did find myself wishing that they do provide bonuses, but I suppose it'd be hard to really determine just how those goods would help. I mean, you could provide a bonus to happiness and maybe decrease the food threshold needed to get a new colonist, but what about the effects that using booze and smoking has on health?
I figured Firaxis went the safer route, otherwise there'd probably be endless ranting. Silver however could have been made into something like jewelery maybe?
Regarding changes from the original, I honestly have not played the original since 1995 or 1996 so it's hard for me to remember aside from seeing a lot of the updates made in Civ 4 cross over. I did play the original to death when it first came out though, and put it back on my computer a couple of times, but then as time went on I moved on and never really went back. There was the Master of Orion, Master of Magic, Alpha Centauri, and Civilization games that I was also hooked on at the time.
In regards to the music, I'm also having a hard time remembering which songs may have been updated. I know that I did have a soundcard back then, and some of the songs sound familiar, but that's about as far as I can go. When I looked in the music folder, I believe I saw something like 28-30 songs.