I'll try to give you some quick answers, but there are soo many angles to view the question you pose...
Varsity level metrics:
FB Velo: 85 plus can live with FB - 80ish gets hammered - high to mid 70s gets weak contact if spotted
Exit Velo: 80 plus usually finds grass - Attack angle/launch angle etc.. is a whole thread to it's self.
60 times: Position specific, but its safe to say anything 7 sec and below will produce a high BA and OBP
Answer to #5: These numbers mean little to nothing if the kid, or the coach, has no feel for the game. Winning starts with the culture of the program. Sometimes we may need to look in the mirror if we are not getting the results we think we should. Also, local high schools are notorious for having up and down years. Most places don't have the luxury of "reloading" every year. They just simply don't have the numbers.