Q: What does one do in order to type by talking on a MacBook Pro?

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That's Dictation > http://support.apple.com/kb/HT5449

OS X Mountain Lion includes Dictation, so you can talk what you want to type on your Mac. To turn it on, open System Preferences > Dictation and Speech, turn on Dictation and choose your language.

When you want to use Dictation, double-press the Fn key and talk. When you have finished, press the OK button.

Also, there are other apps that do it, like Dragon Dictate, but Dictation is free

This support article may assist you:

http://support.apple.com/kb/HT5449

Ciao.

you can use the dictation & speech feature on the mac. it's located in the system preferences.

once you turn it on you can choose different options there as well.