I am a bit confused as to what all the symbols and numbers mean. I get "72 stock and the 133.6 yd ones mean but I'm not sure on the others. Could anyone explain them to me. Thank you.

7 is the # of units in the train 33 is # of passengers 3233 is the road # of the train you're driving 165.9t is the weight of the train.

Well that's weird, maybe i was wrong on that one, but it could be a bug, since it's the exact same # as the road number (which looks correct)