Games-workshop.com
Ebay.
Buy Warhammer Online: Age of Reckoning and it works on Mac or PC.
Games Workshop
In warhammer 40k you cant buy The Emperor of Mankind
6 miles
You have to buy the appropriate Codex.
Buy or trade for it, it is in the standard GW range
AnswerYou can buy Warhammer off the Games Workshop website http://www.games-workshop.com/gws/home.jsp or from a Games Workshop store all over the world.
Warhammer 40,000: Dark Vengeance would be a great start, as it has figurines for two armies (Chaos and Dark Angels) and a mini rulebook.
No, unless you buy a paint set obviously.
You cannot get Warhammer for free, just like you can't get Tennis for free. The concept and the question don't add up. You can however get the rulebooks, codices, and miniatures associated with Warhammer for free, if someone gives them to you, or you win them through competitions. The other alternative is to buy them.