1. the tokens represent the kamikaze planes, and when you decide to use them, you call your victim and throw (1 or 2 is a hit). If you miss you lose that kamikaze (splash!). Remember the kamikazes have to get triggered first (by Allies taking certain territories, whcih i can’t remember all correctly). I’m not 100% sure but i think the kamikaezs can get used the next turn, after activation.
2. AB gives all your planes 1 extra move .
NB gives all your ships 1 extra move, and also repair damaged BB’s and AC’s.
Yes it means all the seazones bordering to that land.
3. That is correct.
4. You mean scrambling? No, only when there is an AB there. Airplanes on an AC of course can.