This is one of my first Lego sets. It was a birthday present from my parents in 1995. It was perhaps the best gift I ever got, which says a lot because for the first 10 years of my life I got Lego sets every year.
The set consists of a yellow and black locomotive, a flatbed for the small containers, a blue mail wagon with a tipping mechanism for the mail, and last but not least the coal hauler.
There are not a lot of track side elements only a truck for the small containers and a platform for the truck to get up to the flatbed.
This set also is one of the few published with two different instruction manuals. Most other sets only have pictures of other designs.
Set instructions on Peeron