1)
"Jedi" is an ancient word from the Journal of the Whills meaning "Where have my limbs gone ?"
2)
For the total limbs loss:
EP II:
Headhuntress arm
Anakins arm
EP III:
Dookus hands
Grievous hands
Mace Windus arm
Anakins legs and arm
EP IV:
Arm of one dude in the Cantina on Tatooine
EP V:
Lukes hand
EP VI:
Some limbs of bounty hunters at the fight at the beginning
Vaders hand
So...more than a dozen of limbs gone during 6 films. They were later (a long time later in another galaxy far far away) used to create something called "Frankenstein".