Finally, it's worth remembering that the rules for Warhammer are broken up into two distinct halves: basic rules and advanced rules.
Basic rules apply to all the models in the game, unless specifically stated otherwise. They include the rules for movement, shooting, close combat and so on, as well as the rules for Panic tests. These are all the rules you'll need for your average infantry model.
Advanced rules apply to specific types of model, whether because they have a special kind of weapon (such as a spear), unusual skills (such as flaming attacks or the ability to regenerate damaged flesh), because they are different to their fellows (such as a standard bearer or a mighty hero), or because they are not normal infantry models (a knight, a cannon or even a Dragon). The advanced rules that apply to a unit are indicated in the entry for the unit in their relevant Warhammer Armies book.