In general old Tyco has little to no value. Old Atlas track also has little value - if it has brass rails it has none. It's not clear exactly what trains you have. Is this one of the Hawthorne Village sets? Do you have the original box it came in, if so how is it labled?
This site might enable you to identify your Tyco train http://tycotrain.tripod.com/tycotrains/
Enjoy
Paul
You would get much more to your question by going to the Classic Toy Trains or Model Railroader forums.
Tyco is a name that goes way back. I have a couple of HO sets, boxes included.
A browser.
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