Well she isn't operating anymore

There was semi heavy fog today so I turned on my park lights, and lets just say when I got to school, I forgot to turn them off
I had a friend take me to my house to get a battery out of my 4X4, but it still wouldn't start up, and there was a ticking noise, which said friend commented that it was comming from the solinoid, so I went and got another, but yet the same ticking sound.... I'm hoping both batterys are dead.... And it's not the starter (Which I don't think it should be?)
Oh yea, I just sold a rifle.... How much does a Stud and a serpintine belt cost in your area (just woundering, i've never purchased either)?