My mom's 2001 Sienna won't start. When I try to start the car, I get a very rapid clicking noise. The lights are very dim; in fact, the dashboard lights flicker constantly and are almost going out.
I'm a noob to automobiles, so I'm not sure what to look for. I tried looking at the positive battery terminal; it seemed pretty firm/tight. There was some greenish crystaline stuff around the terminal; not sure what that was.
For sure, there's a problem with the power; but is it the battery, or something else? And what's that green stuff on the battery terminal? Should I try jump-starting it?