Can I install OSX 10.11 El Capitan on a 2016 MacBook Pro touch?
Solution 1:
No you can't install El Capitan.
The firmware won't allow any version of macOS earlier than macOS Sierra 10.12.1 (16B2657) to be installed.
Also, for future reference, if this model ever needs a firmware update, it is possible that the earliest version of macOS you will be able to install in future will be a version later than macOS 10.12.1.