I have had a quick look.
Scrap it and start again !!!
1. Rotate the caboose so that the front faces Down not 15% to the left
2. Centre the object at 0,0,0
3. Raise object the height of the bogies
4. Add the attachment points a.limfront etc
5. Add textures to the model
6. You cant have lines and arcs, they have to be 3D bits
Dont be dissapointed, just listen to what I say, I looked at this before, and told you to line up the model.
It is usually created in the top view, as boxes, cylinders etc. Look at the tutorials again, and start over.