MAR (Marx?) toys metal trains?? and some other questions....

Well, I've got my price guides with me, so here it goes. I listed the values in excellent condition as well, even though obviously some certainly are not in excellent condition, just to give you a better idea about how the values work with these things. Some would probably rate somewhere in between good and excellent, so use your own judgement. It's hard to judge the condition from some of the pictures. I identified the Lionel pieces as being either MPC or Postwar (1945-69). The American Flyer pieces are all postwar and so are the Kusan and Marx items, except for the Marx IC work cars, which date from the early 70's.
AF 923 IC refrigerator car: $13 good, $25 excellent
AF 25071 Tie-jector car (That's the name that was given to it.): $7 good, $35 excellent
AF 24328 Shell tank car: $7 good, $21 excellent
AF 24566 NH flatcar: is missing it's load, so probably only $10-$20
AF 804 N&W gondla car: $7 good, $15 excellent
AF 904 caboose: $11 good, $25 excellent
AF 25052 silver caboose (it originally had a brakeman on the back that moved): $49 good, $149 excellent (remember, those values are for one with a brakeman still on)
Lionel MPC 9011 hopper car: $6 good, $8 excellent
Lionel MPC PC gondola car: $3 good, $5 excellent
Lionel Postwar NYC operating boxcar (there would have been a man that came out of the door when activated): $11 good, $27 excellent
Lionel Postwar flatcar with fences (would have had horses): 2 posible numbers (can't tell from picture)
1877: $40 good, $70 excellent
1887: $80 good, $160 excellent
Lionel Postwar 6112 gondola car: $4 good, $9 excellent
Military Set: Ben is right about it being Kusan, a company from Nashville that made 2-rail trains in the postwar era. I don't know too much about values on them, but it's a good set that's worth a fair bit.
Lionel MPC 8769 Republic Steel switcher: $19 good, $39 excellent
The Kusan Kannonball FA actually came in train set that was sold as a floor toy, even though it went with O gauge trains, so there never was a powered unit to go with this.
Marx 1015 ICG work caboose with tank: $30 good, $40 excellent
Marx 24 IC searchlight car: $20 good, $35 excellent
Marx 1024 IC flatcar (missing yellow rails): $25 good, $45 excellent
Marx 234 US Army caboose: $25 good, $45 excellent
Marx NYC crane: $10 good, $15 excellent
Marx St. P. & P. passenger car: $35 good, $70 excellent
Marx C&O gondola car: $10 good, $20 excellent
Marx 400 steamers: probably $5 a piece in their condition
Lionel 8142 steamer (goes with the C&O tender): would have been worth $47 in good condition, so much less than that
Hafner tender: around $10

All in all, I'd say that you did pretty good at that auction! Good luck in selling them!