Hey there.
the rules in 100% say: "you need to do all challenges in all leagues"

but in my opinion its:
- All challenges in All leagues
- All races marked with 1st Place
- All challenges in Tuning Section

Let me know about your opinions

100% is defined as 100% game completion, not completing every single thing as that's just completionist goals. As long as the game says it's 100%, it's 100%

Okay. So only the challenges

Short question. Whats with planned Breaks? A run is shurly around 7 - 8 hours long. Would be nice to take a planned break for peeing, smoking etc.

You can take a break but you're not allowed to pause or stop the timer.

go quick toilet in cutscenes, and quit smoking

@GelemboyGelemboy this answer made my day

Edit: Its an unwritten rule in speedrunning that u could not stop the timer except of In Game Time Speedgames.