The armor is purely cosmetic. It's only for looks
We can not answer. You must have had to pr order halo reach to get elite officer armor.
No, there is no Hayabusa armor in Halo Reach.
You simply have to reach the appropriate ranks. The Elite armor does not cost any extra cR.
There is two ways to get it #1 unlock all of the armor #2 is to become the highest rank in halo reach
There is no way to get and different armor for Elites in the BETA.
sadly, no it does not.
If you mean make unlimited armor lock, it's only possible in forge. you have to put out two armor locks, get one person in monitor, the grab one of the armor locks, use it and have the person in monitor delete all of them through the other one while your in armor lock. then you can walk around as normal except your invincible.
if you mean online credits in reach, it means the credits you can use for buying spartan armor parts to customize your look. you do not gain or use real money in the games.
granadier
yes
his helmet is a grenadier
yes, you get JFO armor, and you get mark IV armor, and also a gold visor but that is the max rank.