The best thing to use to 'size' the other objects is the door to the building. I assume it is the door to the freight room of the station. This door would probably be 7 ft tall.
Thus, the building is about 14-Ft from the door sill to the peak, which is about right.
The steps, below and to the right of the door, do not meet the national building code because the risers are 12-inches.
The water tower is 80.5-ft tall. The rungs on the ladder are 3.5-ft apart. The tank holds 167,000-gallons.
The red barrels on each side of the track hold 467-gallons.
The gauge of the track is considered "Broad gauge" at 7.5 ft.
The blue uniformed individual in the foreground has an arm that is 8 ft long. The top of the hat is almost 4-ft in diameter.