Does this postprocessing configuration should be repeated in tv section?
If you use a regular monitor it should be RGB/0-255. Only TVs might require YCbCr and/or 16-235.
And this is general for the TV when it can't handle RGB/0-255 correctly. It is just what your display's video processor can handle. If it is only with some codecs and the rest is fine, you do adjustments inside the codec.
The RGB32 conversion in ffdshow just makes sure that the full RGB range is send to the renderer and nothing gets lost during what the GPU renderer does. This is just a precaution, so that nothing gets cut of before the picture is send to the renderer.
The NV12 in/output you usually get from MediaPortal is fine for the renderer, too. I just like to be sure I always send the same stuff to the GPU to avoid any potential issues with some codecs. Especially on my development machine where I do experiments now and then.
With RGB32 I provide the full color range of a video to the video renderer. Nothing will be cut of, nothing will be added. The rest is up to the GPU. But as said NV12 is fine, too. Not going into explaining the differences of the color formats here. So consider the to RGB32 setting an optional step. It doesn't change the colors, only the format. And from experience all GPUs I ever came across like RGB32 the most. But as said, consider this setting optional to avoid issues.
The GPU driver decides after the renderer has rendered the picture based on the display settings if it should send the colors in RGB or YCbCr format and/or limit the color output if necessary. This happens AFTER the renderer and just defined the capabilities of the display itself.
No need to only check RGB32 as possible outputs. It is the preferred format you want to send out. If - for whatever reason - this is not possible let ffdshow decide. So no need to do anything here. Keep the defaults. Just select your preferred output and you are done. Same for LAV. We do the postprocessing in ffdshow. No need to customize more than needed in the codecs.
ffdshow: Output -> Primary Output Color Space...
Holzi: I don't use MP for TV. So I can't help your here. You probably need to add .ts to the extensions or create an own profile for it. Just a guess though. So it's up to someone else to help you out here.
For LAV only you probably only have to check RGB32. Just give it a try...