In volleyball how many points to be win normally by a team to take that game?
Normal rules are 25 points (a margin of 2 is required, so 25-24 will not win a set, but 26-24 will), and 15 points for the final set (the game is won after winning three sets, it's a best-of-five system). Theoretically, you can win a game with only 65 points (e.g. 25-20, 25-20, 0-25, 0-25, 15-10), but in practice 75 (winning 3-0 in sets) is the minimum.
Wikipedia lists the standard rules; some competitions, especially at the lower levels of play, play fewer sets or even fewer points in a set.