How do I stop my iPhone from telling me by voice what keys I press and instead respond to them
Your device currently has on a feature called voice over which is made for people who are visually impaired.
One touch tells you what you have pressed, two touches will actually perform the intended action.

Triple clicking the home button typically turns off the voice over feature unless you have the magnifier enabled.

Once you have unlocked your device:

-go to settings, use the tap sequence 
-three finger scroll to get to general than use the tap sequence
-three finger scroll to accessibility ,use the tap sequence and turn off the voice over, once again using the tap sequence.