Wow. I didn't expect it to be quite that lean.
At the top of your track pane, there is a button with 4 squares, next to the highlighted one with 1 square.
That is the MC6 equivalent to the "All" button.
Once you click that, the track should show all of your I/O, channel, etc. options.
It
may populate the inspector as well. I'm not sure on that.
Understand that MC6 has been pared down to be simpler for the new user. A side effect of this simplification is that it becomes rather difficult to work on relatively complex projects.
From your screenshot (thanks for that. I love screen shots!) I can see that you are already pushing the limits of MC6.
I would very much encourage you to take advantage of the $29 upgrade to X3(basic version).
You can leave MC6 installed, and you may have plug-ins that are not included with X3.
I think what you are trying to do will be much easier when you have the tools to actually do it.
That offer ends tomorrow, so don't think about it too long.
To override channel data embedded in the file, open the Event List, and delete channel data.
Otherwise, every time you rewind to start, the embedded data will reset and override your settings.
Hang in there. This stuff is complicated, but it gets easier once you get your legs under you.
It has made us all feel stupid at some times. Don't sweat it.