I am a newbie who built my Naza about 1 month ago. (Tahoe Ed was a great help. Look at his set up assitant video) I have a spektrum DX8. You need to use a hobby knife or sharp blade to trim off the tabs...again, do it slowly, don't cut off the lead.I came very close on one and ended up replacing the lead so I would not have a short.
I started with 4 batteries, 3s 2650 and 3000 (2 each). I have not tried the 4s's yet. I would say get as many batteries as you can afford. 4 is not enough. That's only 32 minutes of flying. Get a good BALANCE charger $50-75 range). I found mine on amazon. EXTRA props are critical...you will see why

. You might also want to buy 2 pool noodles; 1 pink/red one blue/green from target ($2 each), cut them down to about 3 inch section, add to the bottom of quad - I used rubber bands and paperclips. This is the best $4 solution to lift your quad off the ground, gives you orientation e.g. pink ones in front) and takes a beating during your first few crashes without hurting the quad. It has been the best $4 I spent. Prop wash can affect your flying, so you may eventually want to replace them in the future. I still have mine on. I have learned from lots of other mistakes of my own and others.
My biggest suggestion is read every post and more importantly, download the manuals now and read EVERY single word - the translation is not the best so you really have to understand those manuals before you start the build. Because I spent so much time reading before I got the kit, it only took me 90 minutes to build...oh yeah, watch how to solder videos on you tube.
Good luck, I am addicted. My wife has to be reminded I could have taken up a different hobby.