1)I am not too sure, but I think you have to create the parachute, set it to a certain height, and moveindriver the soldier.
2)When you create or edit a soldier, there are three slider bars in the lower left hand corner of the menu. One is damage, one is fuel, and the last is ammo. Setting the damage slider all the way to the left will make a soldier who is dead. You can also accomplish this by putting this in the units init field:
this setdammage 1;
3)I don't think this is possible
4)If, by team, you mean group, put this in the leaders init field:
mygroupname=group this;
Where mygroupname is the name you want to name the group
5)I don't know, I have never used CoC Unified Artillery