Use an alcohol wipe to clean the handle before your session. This will remove the residual sweat/body oil left behind on the handle from previous training.

Tape will likely help with some drills, but will kill your hands for any high-rep ballistic drill like snatches. I'm a fan of chalk, but I train outdoors and I'm not too concerned with the mess it might make.

The only time I recommend gloves is when blisters come out. I had a situation last month where I had four blisters pop up at once after a session. These helped tremendously. No chalk needed. However, use them only once you've reached the point of losing your grip or you'll miss the grip strengthening afforded by a good kettlebell session. Strive towards the goal of training without needing them.

Also, get some sweatbands for your wrist. Keep a hand towel nearby to wipe off the sweat on your hands; the sweatbands are just for keeping the sweat from running down your arm into your hands.