This game has so much unexplained concepts. Luckily, the game creators have made videos explaining the game's main features. The video was made when the game was completed, 2010.
Tutorials
http://www.youtube.com/playlist?list=PLqC1D0Sju0a3evs3y8mRu0cPBQPB6IZ4e
What some of the stats do
Recover - speed after using a special (Physical Skill)
Cast - Speed of casting magic atk
Swing - Chance to perform multiple amount of atks per turn (Only if the skill "Swing is used)
Grab - % of grabbing the foe
Kick - Amount of kicking power in kick skills
Link - Continuation of combos
Focus - Magic cast time
Reflect - Repels magic back to the target
Guts - Receives HP when HP is critical
Breaker - % to escape a combo
Slip - % to escape a grab
STR - Attack damage
VIG - Defense
MAG - Magic damage
MEN - Magic defense
DEX - Accuracy
SPD - Attack Priority