Step 1: Pieces
Step 2: Preperation
Don't turn on the valves yet or else you will get very wet, and so will the rest of the room.
Step 3: Attaching the Faucet
There will be two nuts, most likely plastic, that can be tightened on the underside of the faucet to hold it down with a crescent wrench.
Step 4: The Drain
With waterproof bathroom caulk, coat the underside of the drain opening and set it down into the bottom hole in the sink. (Images 2 and 3).
Before the caulk sets, on the underside of the newly placed drain place rubber washer, plastic washer, and plastic nut. Tighten to hold the drain in place.
Screw on the next piece of drain. It will have an arm that will be needed in a moment.
This part is very hard to explain, and there are many little pieces. The faucet instructions should at minimum have a diagram to help you figure it out. I shall try to explain as best I can. From the top of the sink, drop in the thin metal part that will control whether or not the drain is open or closed. Next, take the plastic nut off the arm of the second drain piece and the put it back on with the white sphere with the metal arm in it. Now, attach both the metal control arm from the top and the metal arm attached to the sphere to the long flat metal piece with holes in it. The holes allow you to adjust for the size and shape of the sink and drain.
The next part is a true puzzle that may require many trips to the hardware store to find the proper curves that will allow you to connect the drain from the sink to the drain in the wall. Once you do find the proper combinations of shapes, be sure to tighten all joints securely to prevent leaks.