No, it's not legal to sell Minecraft maps/mods.
Yes minecraft adventure maps are downloadable for the general public for free
Adventure maps are usually used in minecraft maps it allows you to not break certain blocks but you can use a certain item to break that block.
Dead Lox user name on Minecraft is Deadlock. Deadlock adventure maps can be downloaded from the free down load Minecraft website. The site also has links to other adventure maps for Minecraft.
Nope
you can get minecraft mods and textures off the minecraft mods website.
yes
The map can be a mod, but default is just a map download
bearshare is not required to get minecraft mods.
there are no mods in minecraft pe i hope there will be
Yes, most Minecraft Mods are updatable.
try going to planetminecraft.com they have skins servers mods maps and many more