I would think it's clearly spelled out in your Atkins book. I don't follow that plan explicitly but I've you my opinions on your questions - These assume that you are trying what is called "induction" on his plan (Minimum 2 weeks, no more than 20 "carbs" per day)
1) are all deli meats a "green light" item?
Most I have seen have too much sugar added. You probably not be able to eat enough of these and feel satisfied without bumping up into 20 carbs. So the answer to "all" is: No
2) are all the green light items allowed, allowed in unlimited quantities?
No, If you consider green light items like hard cheese, on the Atkins plan there are limits to the amount you can eat of these. Read the book for specifics.
3) is kielbasa, bacon, pepperoni, and kielbasa allowed?
see number one, I consider all of these prepared meats "deli meats"
You probably don't want to hear the above I understand!
But you'll be best off eating unprocessed meats with attached fat, Low carb vegetables like celery, bok choy, lettuces, spinach, cabbage, etc and if you need to add fat for cooking use real butter or coconut oil, at least that's what I did and still do.
From Atkins background there is Dr. Eric Westman's distillation of what to eat "Page 4" is what you hear it called. He's says this over and over...
https://youtu.be/dSLf4bzAyOM?t=950
"If it's not on the list, don't eat it."
"Stop eating when you start to feel full"
Try it for 90 days regardless of any scale "progress" and see how you feel.
You will do well.