Hey, I bought a Steering wheel called Thrustmaster Ferrari Red Legend Edition.
I wanted to play this game and somehow my gas pedal switched with the brakes.
My brakes are now Gas and my Gas is brake.
Please help me.

On the main menu:
- click Options
- click Controls
- click Axes / FF
- reassign the Throttle and Brake axes

https://en.lfsmanual.net/wiki/Options#Setting_up_the_wheel

Your posted in wrong section, not game bug.
Your post could be either here
https://www.lfs.net/forum/49-LFS-Beginners-Forum
or here
https://www.lfs.net/forum/5-Technical-Assistance

anyway if you check carefully your Options/Controls configuration, you will find the solution (keyword: Axis)