Answer:
You throw me out when you use me and take me in when you are done.
You used to come to me for all sorts of information and knowledge before the internet was born
I build bridges of silver and crowns of gold. What am I?
I have two bodies joined together as one. When standing still I run and run.
I am a protector of the scoreboard.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?