How could you make a scoreboard out of the top 25 players on the server.

With Level, HP, MP, Strength, Defense on it. Level being how you are scored on it. The rest are just there to tell you there stats.

I just have no clue on this. Any help would be appreciated.

So if your level 20, and another person is level 19, your Number 1, and hes Number 2.
an ingame scoreboard or using the built in hub scoreboard? (example Feval Standings)