Gen 2 Prius Died and won't start with a full battery

Hello, recently I was surprised to find my Prius, which I had driven without issue just hours earlier, to be completely dead. The battery was brand new, maybe weeks old and it gave me an astounding 3.6v reading!
Using a smart battery charger I charged it up to 12.8 volts. That got most electrical systems back on. The fob works, lights turn on, but pressing the ignition does nothing, no lights, nada. I realized after the fact that my gas was low and that could be an issue (I still had one bar, wasn't flashing) so I added about 8 gallons, still nothing.

I tried various things like attempting to start then disconnecting the white plugs from the positive battery connection and letting it sit, that seemed to work but not for me.

The fusible link seems to still be intact. Not sure what else to do or try.

 

Correct, no clicking reactions when brake and power pressed. I hear some sounds that are typical to when i press the brake pedal, hard to describe, but from the dash area more like a whirrìng or humming sound and a "dink dink dink dink" but deep and faint...I hear relays. Click when i open the driver door, that's it.
Other clues: headlights work fine, door lights on when doors open, interior lights functional, key fob unlocks but here's something interesting, it seems to think the key is in the car, even when standing quite far away when I try to lock it it makes that sound that says "nope, keys in the car!" The lock and unlock on the door panel works however. Mirrors arent. Currently adjustable

doorQUOTE="Tombukt2, post: 3476732, member: 188908"]So when you push the start button with the brake pedal depressed you're not hearing the clicking of the relays in the back of the car that you've been hearing as long as you've owned the car?[/QUOTE]

 

It does nothing. For reference, I've checked every single fuse change. They are all fine including the feasible lengths under the hood and the one twenty one that is attached to the positive on the battery.

 

Sorry I meant to say fusible links