We really need more information as others have stated above. If the fastrack had a bad connection it will not kill power to your accessories which are not connected to the track.
You said " I removed the engine and placed it back on the track and then everything died. " That sounds like a short in the engine which tripped the breaker in the transformer. I bet, after a few minutes the breaker reset and you had power again. You also stated that the caboose remains lit, but the engine dies on the same section of track. What transformer are you using?
Since you have a lighted caboose, run it by hand over the layout and see if it remains lit over the layout. You can also check the voltage using a meter on each section of track.
I would test the engine on the workbench, to see if its working OK.
Its also possible, you have a single bad piece of fastrack which has a short and is causing the problems. But lets start one thing at a time. Test the engine off the layout and see if it runs ok.
Joe
