If you get killed or kill someone they/you have a choice of taking an item from you (like a scroll or weapon)
In a fight from a mission you can't just wait 10 minutes you have to reply or the mission become invalid when you finish it you must either fight back or esp from the mission and fail it. (after an attack has failed you regain all your hp and chakra)
When you kill someone u get the choice of money or an item (if have[including anbu armor and masks])
The rates for money are
Kage (2000 kin)
L. Sannin (1500 kin)
Sannin (1000 kin)
Jounin (500 kin)
Chunnin (200 kin)
Genin (50 kin)
The rate for kill points are
Kage (20 Kp)
Legendary Sannin (15 Kp)
Sannin (10 Kp)
Jounin (8 Kp)
S. jounin (5 kp)
Chunnin (2 Kp)
Genin (1 Kp)
The rate for exp are:
Kage (50,000exp)
Legendary Sannin (20,000exp)
Sannin (12,000 exp)
Jounin (5,000 exp)
S. jounin (2,000 exp)
Chunnin (750 exp)
Genin (100 exp)
Killing is not just for making money it can also be for special items such as the Mangekyou Sharingan or Curse Seals
For Reviving The rates are
Kage- (1000 kin)
L Sannin- (800 kin)
Sannin- (700 kin)
Jounin (500 kin)
Chunnin (200 kin)
Genin (100 kin)