Hi,
The kk board will (most likely) not have an auto level function.
For esc I would suggest Hobbyking SS Series 18-20A ESC (card programmable):
http://www.hobbyking.com/hobbyking/s...idProduct=6458
For motors:
hacker Style Brushless Outrunner 20-28M
Yes, all 4 motors can be tied into 1 3 cell pack, no worries. Get a hi-discharge pack like Turnigy Nano-tech for example, see this category:
http://www.hobbyking.com/hobbyking/s...p;ParentCat=85