how to make blocks,villagers talk

1. when you make the map make sure cheats are on if not get too many items

2. hit the talk button on your keybord you can find out what button this is in options

3. next type /give (your name) 137 64

4. place command block on ground enter it with right click

5. type in say and what ever you are going to say

6. redstone it up and done