This class is also known as Warrior or however you want to call it. It's not made for damage dealing and people only use this class for grinding or/and luring different type of mobs that couldn't be soloed or killed.
Class Spells are sold by Swordsman Trainer Al Slashu in Patrian.
Some spells are monster drops, this is indicated at the right side of the spell (see below).
Click on the "info" link to find out where to get the spell.
Double click to learn and they will be present in your spellbook (key "s").
For easy use you can drag the icon to the quickbar (key "f2" to activate/deactivate the toolbar).
The number on the quickbar corresponds to the number on your keyboard (NB: not the F-keys!).)