Long time lurker, long time off and on player, but still pretty much a newb here!

Questions:
1) What benefit does courage have? What does it do?
2) REPAIR tactic:
2a) Does it only repair YOURSELF, only TEAMMATES, or both? (or
neither?)
2b) I read here that repair was not useful in the early part of the game. When does it become useful and how many upgrade points should I spend in it?
Thanx for taking the time to read my post and responding (or not). I have tried to lok up these answers myself but find I am just running in circles with the search function. That, and help doesn't answer these specific questions (that I have found).
Psychomud
http://psychomud.deviantart.com/