When I was doing this, I followed what someone else advised.

put the tire back on, and lower the car. alternatively, have someone hold the brake pedal down, but it might still slip. I got a 6' metal pipe from home depot, and slipped it over the end of the breaker bar, attached to the 36mm nut. I had to lean on the pipe pretty hard, but the nut came right off.

Mine looked about like yours when I took it off. Also, get some PB Blaster, spray, and let it sit, overnight if possible. That stuff is magic to help loosen these.