To get credits in Halo: Reach with a silver, or offline account, you need to play offline Campaign, Forge mode, or local Custom Games.
You always get credits in halo reach until you reach inheritor, you only get banned if you get said credits illegally...
no
you dont
You wont get credits for each individual kill, but when you rank up to gold you will get a few thousand credits depending on which commendation it is.
x credits
Yes
rank up to brigadier and buy it for 300,000 credits.
you get banned by modding credits instead of earning them yourself
300,000 credits
you CANNOT get 3 billion credits on Halo Reach. People who you see on youtube getting 3 billion credits in Reach are modders because there is a "credit cap" so that you cant go over a certain amount of credits.
As much as we all would like one, there is no cheat to give you "tons of credits" in Halo: Reach. You'll just have to play the game as usual.
you need to save up all your credits. you should google halo reach tips and subscribe. they are offering there guide.