Ok, so I have played pretty hardcore and leveled up two groups in retail BFA and done a lot of things with them. Obviously there is still a TON i don't know or haven't done but have a good feel for the mechanics and such. The 5 man encounters/M+ etc are cool and all, but at my heart I am a raiding type of player. I played EQ2/EQ1 and raided every zone I could for a long time, by myself. Played all 24 toons at once on EQ2.. positioning, DPS, heals, strats etc etc - The thrill of game for me is to figure out the puzzle of how I can run a raid strat and kill MOB's by myself. It just is what fuels me and makes the game fun for ME. I don't care about the gold or the loot (well, upgrades I care about but not loot to sell). I just want to win and I want to do it myself!

I get WoW may be totally different and there may not be much I can do, so a few questions:

1. Is there ANY info or videos out there on boxing raids?
2. How many toons do I need for raids? Is it like 10 OR 20? I have seen so many answers that I am not sure.
3. Based on answer for number 2, what generally do groups look like? Like is there an MT group with Tank and 4 healers? A full DPS group? Like how does it work?
4. Are there possibilities of taking whatever answer to number 2 is, and making it like an MT, a few healer's and then like 20 Hunters? Or whatever. Like overwhelming raid targets with say 10+ DH's or mages? Like in EQ you could do a lot of targets with say 40 Magicians and their pets. That exist here?
5. What is the reality of my being able to do many raids? Is there just too much movement and positioning and action strats (like pick something up and throw it, or whatever)?
6. If I can't solo raid BFA/Retail, would I be able to in Classic or TBC?

I have 10 X 120 boosts and 10 X 110 (10 accounts)- So instead of making like 1 of every class on all 5 accounts, I was wondering if I could start on my raid force or if solo raiding just doesn't work.

Hope that all makes sense, and remember, only been paying WoW for like 1.5 months so please forgive any dumb questions.