[Suhiir]

I can give a little help with #6, been working (when I have time/energy) on the USMC OOB for a "while" now.

In 1972 the USMC adopted the TOW missile.
At the time these were jeep mounted and placed in an anti-tank company (48 launchers) that was part of the division tank battalion. This unit was intended to be split for operational attachment to the infantry units.
In apx. 1985 each infantry regiment got a TOW platoon added to it as well (12 launchers).
In 1993 the regimental TOW platoon was reduced to 8 launchers in a TOW section.
In apx. 2004 the TOW company in the tank battalion was deactivated (except one platoon with the Anti-tank and Scout Platoon), as was the regimental TOW platoon. In it's place each infantry battalion was given a TOW platoon (12 launchers).

In 1975 the USMC adopted the Dragon missile.
These were first allocated to an anti-tank platoon in each infantry battalion (12 launchers). This was operationally split so each infantry company had 2-4 launchers.
In 1999 the 12 Dragons were replaced by 8 Javelin's (each company normally gets 2).

Yes, the USMC uses a LOT more ATGM's then tanks.

In addition the USMC relies heavily on helo mounted TOW and Hellfire missiles and the Maverick (usually on the AV-8 Harrier jump jet) for it's anti-tank capability.

Hope this helps.