If you got the 101vapes MVP v2 kit, it comes with an iClear 30 Top-Coil Clearomizer.
As far as BDC and BCC, I don't think the heads are interchangeable, but either kind will work on an MVP (Example: Protank 2, Protank 3, EVOD, Unitank, Davide Glassomiser, Puritank etc), provided they are 510 connection. Well, 99% of everything is 510 so unless you're trying to mix some strange devices together you shouldn't have a problem. With both kinds you have interchangeable heads:
This is a Protank head. They also work on EVOD. EVOD heads also work on Protanks. I believe the BDC (Bottom Dual-Coil) heads are separate from the regular version. I've heard they aren't interchangeable but I cannot 100% say, I don't own a Protank 3. The heads you will want to change after they stop performing as well, this can vary from user to user, juice to juice. With a nice clear juice, good maintainence, you can have a head last 2-3 weeks+. If you're using a dark, sweet, 100% VG juice and chain-vaping it like crazy... probably will only last 2-3 days. YMMV
Cleaning can be different from tank to tank, I generally give mine a good soak in some vodka and let air dry for a few hours. You can search YouTube for many videos/guides how to clean your tanks just search "how to clean your [insert device name]."
Check out:
http://www.youtube.com/watch?v=aab99QhW5Ww for a general idea of how they work.
Hope that helps!