You cannot do anything about the app bar at the bottom of the messages app. Sorry you don't like it, but it's there and hard coded into iOS. I don't understand what you're asking about the microphone? It's clearly there in the add a response part as you can see in the screen shot you posted.
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User profile for user: amberfrompgh
Question: I’m missing my microphone off my texts and the bar that’s on the bottom I cannot stand