1996 Lexus LX450- Not Starting

I have a 1996 Lexus LX450. It doesn't start. The inside lights work, the radio etc. But I tried to charge the battery and not much difference. All I hear is a rapid clicking. The battery cables seem to have a lot of white stuff (corrosion?) On them especially the negative terminal. I don't get much of a spark when I tried to charge it and I touch the metal with the exposed negative part of the jumper cable. Is it the battery? Starter? Or neither? Thanks for your help.