There are some pretty neat pics and info about Houston Passenger Rail and Stations from the old days on the walls, and vending machines inside the Station.
Taxis are usually not around the Station, but can be called if needed.
If not on a trip, the Creative Chatter PVs are stored on the tracks behind the Station,nicely restored Dome and Sleeper.
If you're on #1 I wouldn't try to walk to downtown in the dark, but if riding #2 it should be OK if you have time,be sure and ask.