Does a wheel hub assembly kit come with a bearing?
Wheel hub assembly includes bearings. The wheel hub is where the rotor sits on and allows the tire to rotate. If this is for front wheel drive it should come as 1(one) whole unit with bearings already installed and you just replace the whole hub. If it is a kit that requires you to disassemble and reassemble the whole hub then your going to probably need some punches, wheel bearing grease and a bearing packer.
The hub assembly includes the wheel bearing. In nearly all cases, the bearing will be already installed in the hub. Also, I suggest http://mibearings.com for new wheel hub assemblies. Fill out the form on the front page. Good Luck!