the post means number of post you have already made... you get the forum points at the end of the month..... the top answer depends on wat the other forum memmbers think about your post.... hope you got all the things you wanted to know..
there is nothing like top answers. its the number of your posts marked as posts are counted, the answer can be good or bad. If its marked as answer, then you get one post MARKED AS ANSWER, and so on if many posts are marked as answer, the counter increases. Hope you get the point now, please mark post as answer ;)