Hello, I am getting to the stage where I am designing websites for proper customers, what kind of questions am I to ask / discuss to the client.

I have no idea of the best moethod, also I know i have asked before, but what would you people charge for a web dev job, i know its charged more the longer the job is, but is there a pricing guidline at all?

Any help about anything I have or havnt mentioned would be great. Cheers