If a player Rajesh could not advanced to semifinal round even after scoring a minimum possible points then what is the minimum points scored by him?

In this case top 3 players should get maximum possible points and remaining 5 should get equal points and Rajesh got advanced with tie breaker rule.
Bottom 5 player have in total 4 x 5 = 20 matches and each match will fetch minimum possible points when its result is tie. So minimum points in 20 matches is 20 x 2 = 40 when distributed equally to bottom 5 each of them will get 40/5 = 8 points.