Good stuff!

At the VERY least, I see a wood sided reefer and a couple hoppers.  That reefer can make a decent wood sided box car with a scratch built door and door tracks, or be repainted and weathered into a decent reefer.  The hoppers can be used with new trucks & couplers, or shortened into two-bay models.  You could even use two to make a high-sided coke or wood chip hopper, as some railroads did.  and of course, that F-unit can be turned into something decent with just a little work - I've done a few of those.

I love getting boxes of trains like this.  There's always something I can use out of them.

Finding free stuff....

is kind of hard around here. I live out in the country and there are no hobby shops  and not many yard sales to speak of. Never get to train shows either.   Right now I need an old 40 foot wood boxcar to make a shed out of but I've come up empty locally. Haven't found the first bit of train stuff actually.

Michael

motorcar

That smelly gas burning motorcar could be put at the back of the layout, or under a tarp.  I have a few cheap motorcars that will be under canvas, or behind a showroom window, or on a lift--somewhere that it can be seen, but not really examined.