I believe both of those are included with InDesign as part of the install package. You should check to be sure they really are missing and that your crash didn't do something else very odd, like substitute a different font for the Minion Pro.
In any case, if fonts are missing, you need to locate and install them.
Thank you for your response, and for clarifying that those fonts (which do not show up for my current document, old documents where I successfully used them, or any new documents any more) are generally part of the install package. Unfortunately, I have no idea how on a PC to "locate and install" them, so I'm currently trying uninstalling and reinstalling InDesign. (Futura disappeared, too, so something strange has been going on since the crash.) We'll see if that works!
Because you don't get a disk or a downloaded installer for the CC apps that you can pull apart to find the fonts, I suspect what you are doing is the best option.
It's possible that the fonts are now installed only through TypeKit if you didn't have a previous version, in which case you would need to activate them again that way.