'99 Ford Taurus no power?

Ok, I have a 99’ Ford taurus that I bougt about 2 weeks ago (I know bad idea) but it was only $2000. Well I was drving last night and it was working fine but when I got in it this morning and tried to start it nothing happened. Usually when your battery is dead it makes a clicking sound I thing but nothing at all works in my car right now and I don’t know whats wrong. can anyone help?

I guess I would start by checking the voltage of the battery…if charged then a loose cable wire or ground cable connection. wire off from starter motor?? It was running the day before…other than that ???