I appologize if this seems rude, but if you are asking questions like this you should NOT be working on your own brakes, as they are the most critical safety feature of your vehicle. I would let a pro handle this for you for now, but learning is always a good thing.

Yes, it is all the same fluid, as it is one system, not two. Bleeding can be done many ways: with an automatic pressure bleeder, with a vacuum bleeder, or (my personal favorite) the slow old-fashioned way. The old fashioned way involves sucking out most of the fluid from the master cylinder and refilling it with new fluid. Then, working from the wheel farthest from the master cylinder to the one closest, one person breaks open the bleed screw (once a drain tube is on it) while another pushes the brake pedal to the floor. Then you close the screw, let the pedal up, and then do the process over again until the old fluid is cleared from that caliper/line. You then move on to the next one. You need to refill the master cylinder from time to time with new fluid as you go. Time consuming and messy, but still the best way to do it if you want a 100% air free system.

Keep reading and learning about how it all works, but again, I would not attempt this on your own until you not only fully understand how the brake system works, but also how to do the work.