A short docu to the german TTR might be found here:
https://www.bttv.de/fileadmin/bttv/m...ibung_TTRL.pdf
It should be accessible without login, but is only available in German.
Quick answers to your questions:
- Range: the worlds top players are around 2800, an absolute beginner should be around 700 after a few matches (initialisation might be higher as the average of the league and position is used)
- The strong TTBL players should be between 2400 and 2600.
- No separation between women and men, but you can set filters.