MY Z would not start

[ZR-1Rookie]

Hi all,

Today was a terrible day. I had family in town and I was bragging about my Z. So I took everyone to the garage to show my girl and she would not start. It seems like the battery was dead (all of the idiot lights barely came on), there were a ticking sound coming from the inside of the car and it would not start on a jump. Funny thing was I just had her out last week without a hint of a problem. Does this just sound like a battery issue or is it something more serious. By the way how in the world do you remove the battery. Thanks for the help in advance.