Installed battery backwards now car won't start

[shakil21]

Hello, all new to the forums for Lexus. I was installing a battery on my 2014 IS250 F sport and installed it backward (negative to positive). The terminal sparked and started honking for 5 seconds or so and that's when I took it off realizing I installed the battery wrong. I put it back together correctly went to go start the car and it wouldn't detect my key so I held it to the start/stop button and started the car it turned on but I have every single light on the dash, and the car doesn't let me rev, move the steering wheel, or move the gear. It has a bunch of signs like eps, srs, abs, and brake override failure fail. Any idea what it could be? I checked the fuses they all check out to be good still haven't looked into the relays or fusible links. Any help would be appreciated!

[Eyesore]

You blew the main fuse . 

[shakil21]

I heard it if was the main fuse the car wouldn't start but I'm open to replacing it. I tried searching where the main fuse is located? Where is it located and what does it look like? There are many fuse panels throughout the car.

[Bykfixer]

It's under the hood in a fuse panel near the battery in my GS. Popping the top off of the panel isn't so hard. The problem (again with a GS) is the fuse is held down by a 10mm screw on the UNDERSIDE which is quite a pain to get to. 
 

After that I put red tape on the + wire and painted the top of the + post red with a sharpie