If you don't mind bad karma you can kill Kimba in Big Town.
Yes, the character known as Dogmeat, who was originally in the first Fallout game and can be a companion in Fallout 3, is also in Fallout 2. There is a hidden room in Junktown in Fallout 2 inside the Cafe of Broken Dreams, where you'll find him.
It matters where you live, you can find BBS in Sports.
no, fallout 2 is for pc.
yes
Any level. You find them around. Depends on what fallout game you are playing. Some of the followers have karma requirements.
fallout 1 doesnt, since the game ends fallout 2 does
In my opinion, Fallout 2.
Yes
No, Fallout 2 is a single player game only.
yes
There are no Mounts in the unmodified version of Fallout 3.
the lightest you can find