WREQ743

So I checked it out, never heard of it.  Sounds cool!

So first let me start by saying I am new to GMRS and am trying to understand how it all works.
 
i have been scanning to hear what kind of traffic, language, and etiquette is on the air.  I have heard what sounds like Morse code, specifically on 18/19. What is this?
 
I have also checked on the repeaters map and saw that some have “travel tones”.  Can some one explain this or point me to a link that will?
Why do I hear an automated message that reads out someone’s call sign but no other communication. I looked them up and they are half way across the state which is cool but why don’t I hear anything else.
 
Lastly, what is the next step to use a repeater once I send a message to the repeater’s owner?
 
thanks,
 
Kenny
 
WREQ743