You start with 2 in each stat. Your race, class, and profession each increase one attribute by +1. Your stats increase when you level up, based on your race, class, and profession.
When you level up, you'll choose three attributes to raise by +3, and the rest will increase by +1. Which attributes you may choose are based on your current (not starting) race and class, as well as your background (which is immutable).
Each point of Strength increases Attack Power by 3%, Armor by +1, and Penetration by +1.
Each point of Agility increases Accuracy by +1, Evasion by +1, and Initiative by +1.
Each point of Willpower increases Spellpower by 3%, Focus by +1, and Mental Resistance by +1.
Each point of Toughness increases Health by +5, and Physical Resistance by +1.
Each point of Cunning increases Critical Chance by 1%, Arcane Ward by +1, and Magic Resistance by +1.
Each point of Presence increases Sexiness by +1 and Leadership by 2%.