There are no cammands you just write whatever you want on it.
Most likely no, because commands is only a thing that is used for computers.
/setblock 68 1,2,3,4, ~ ~ ~ for wall mounted sign and /setblock 63 1,2,3,4,ect ~ ~ ~ for free standing
No. It is in WorldEdit commands.
Minecraft commands were first seen in bukkit server. We do not know when the first commands were made for bukkit servers however
notch used programming which i have no idea how to do but long minecraft commands are pretty much the same thing.
the possibilities for commands is endless in bedrock edition as long as you know how to add your own custom commands using command blocks which you can get by typing /give @s command_block
no
you have to cyt
You can't have commands on minecraft classic but you can in multiplayer classic
You get a mod, such a Single Player Commands.
/give <name> 261 1
In multiplayer, commands are generally started with a "/" Single player commands have not yet been added, unless you get a mod that has commands, like WorldEdit. They will be added in the next update, 1.3.