Looking to switch from CenturyLink

So I now live in a newish house in North Las Vegas.  The CenturyLink box is currently on the street-side top-floor bedroom.  However there is a Coaxial outlet in my room on the bottom-level backyard-side.  

So questions are:

1.  Is the house wired for Coax?  

2.  Is it extra to have it in multiple rooms?

3.  Where do I look for the TV info?

4.  Why isn't there an email for support, you'd think they'd be trying to get my business any way they can.