cocos and stuff

HI, In my non-op list of equipment I have three cocos apparently operational. They are of two different styles. The smaller is the TRS80 color computer with real keys on the keyboard. I have two of these one the case was wiped out, board is ok. The larger is TDP-100 personal color computer with chiclet keys. Lacking docs I presume these have rom Basic. What expansion is possible (there is a port) and how hard. Do they run any real OSs or some TRShack? What's the odds of finding DOCS especially schematics? I have a xt class machine with an Intel Inboard386...(works too!) what's the odds of finding schemtics or expansion ram for it? The 1meg of ram is tight for somne stuff. Currently I use it as a 10x faster xt. Allison