Although Xavier is absolutely right about the final adjustments, you may wish to follow some basic, time-honored guidelines to establish a starting point. Examples of first-approximation settings you can try are:
1) saddle height: With your HEELS on the pedals and someone holding up the bike, spin the cranks backward. You want a full or near-full knee extension, without rocking the pelvis. When your feet are in the proper position, you will have a slight bend in the knee at the bottom of the stroke.
2) saddle-to-handlebar distance: One cubit, i.e., with your elbow pressed against the nose of the saddle, your middle finger should just about touch the back of the handlebar.
3) handlebar height: Varies more than any other setting from rider to rider. For general-purpose riding on drops, I like to have my back at about 45 degrees when my hands are atop the brake hoods.