ok this is a must read for people so they understand the site.
basics:
Kan: this is money to be used in the Soul Society.
Yen: this is money to be used in the human world.
Level: the number that represents your power (going from 0 onwards) that changes according to your exp.
Health: how much damage you take before you.
Reiryoku: this is how much power you can exert, once this runs out you collapse and the battle/training ect. is over.
Reiatsu: this is how much power you let out of your body, you can adjust this in battle and it can be used to give bonuses in battle, but the total amount will be subtracted from your total Reiryoku you can use.
Reiatsu Type: this is such things like element you use and links between hollow and shinigami.
Attack: how much damage you can do with your body alone.
Defense: how much damage you can withstand before a lose to health happens.
Speed: how fast you move.
EXP: how much battle and training experience you have, that determines your level.
Zanpakutō the name and abilities of your Zanpakutō.
Stance: the way you learn to fight, everyone has to fight by some basic rules that are based by there stance.