So, if I buy all the 3 DLC's will I be able to play the game? It's too expensive to buy both the 3DLC'S and the game.
You can play the game, no problem, with the base game alone. The other stuff is just extra content (a lot of it not terribly worthwhile, imho)
EDIT: what exactly do you mean by "play the game"? If you mean "play online with/against other players" or "play the campaign", then the base game is perfectly adequate.