Yep.. All topics and posts have gone, and it will take a long time to get your forum back to the way it was. I'm not sure if guests are allowed to post. But if there not. I suggest you let them until you start getting more registered users. Try not to make yourself sound to desperate by saying come register. This just gives off a bad impression and puts users off. You also have alot of forums. I suggest maybe you join 2 or 3 forums into 1 forum.
Anyway. Hope everything go's well. And good luck!