When I minimize the Console view, it disappears, and I cannot show it again using the Windows > Show View > Console menu.
How do I make this view visible without reinstalling Eclipse?
I had the same problem too. Impossible to restore the console after minimizing it in Juno, and it wasn't appearing in the toolbar.
In the "Window" menu there is a "Reset perspective" link. It will restore Eclipse perspective to the one you had after a fresh install.
If the console is still not showing up after this operation THEN click on "Window" > "Show view" > "Console".