All these lights just came on yesterday. Not sure what happened, but the weird thing is that I was hearing this clicking noise for the past few months every time I pressed the brake. Now I don't hear that noise, but these lights are all on. I took it to my mechanic and was told my brakes were good (new pads and rotors).

First check the fuse under the hood for the ABS system. But it sounds more like the ABS controller might be bad. Good luck.

alternator
battery

I had this happen on my 07, These cars have an aluminum rear carrier for the suspension its raw aluminum. it gets oxidized. I had to remove my rear abs sensors and clean up where everything mounts. Something about the corrosion throws off the rear sensors. I would say check that, its free and pretty simple to do before spending money. I cleaned mine up and sprayed some clear coat paint over the raw finish to avoid the oxidation coming back. It's been fine ever since.

Might want to have it scan for codes, hopefully it's not the expensive ABS pump