[@Gareth]
Q1: yes, they are like wooden automatons, and have souls.
Q2: Their [i]bodies[/i] are created. A mage or alchemist could build the body, but they'd have to also infuse it with a soul. But again, still possible. Most were mass produced by the Artificers of House Cannith. We likely won't be going to House Cannith, but you can still be from there.
Q3: Their Personality comes from their soul, and each is different like you or I, but like children, when they are first created, they are heavily influenced by their surroundings. 
Q4: Warforged can have a fully developed Personality, whether it's quiet and reserved, or loud and bombastic
Q5: While they can feel emotion, sympathy, and what not, they often have a bit of a hard time Expressing emotion. It is most often told through their voice, eyes, and gestures, if needed. They can smile and frown, but not very well.
Q6: Warforged speak just like normal people. They can roll their R's, get tongue-tied and even develop accents based on their language and homeland.