A:
That port u have is a VGA port. This is an older way to connect displays. Check this link if u want to get a basic wiki understanding.
http://en.wikipedia.org/wiki/Video_Graphics_Array
To connnect ur computer to tv, there are a few things u need to know.
1st-what ports u have on both pc/tv?
2nd-Do u have a cable that can connect them?
3rd- Do u have any adapters?
In your case, u have a VGA and the tv has HDMI. U can buy a HDMI and VGA cable. If not, get an adapter to make it capable.
Hope this helps.