Custom maps in minecraft can usually be downloaded for free.
No
You can't read rules for custom maps. They will be at the start or on the forum page.
SkyBlock is a great map.
It depends on the map.
Yes, you download it then plop it in you saves folder
They cost memory. No money though.
There are no commands in minecraft PE as far as I know.
You cant when you delete them there lost forever. Unless your worlds backed up.
As of my last update, "The Crafting Dead" is a popular Minecraft mod that brings a zombie apocalypse experience to the game. However, it was primarily designed for the Java Edition of Minecraft and may not be officially available for Minecraft Pocket Edition (PE). There are similar zombie-themed mods and maps for Minecraft PE, but they may not replicate "The Crafting Dead" experience exactly. Always check the latest community forums or resources for any new developments related to mods for Minecraft PE.
Unfortunately, no, you cant. Only on a PC or a Mac
there are no mods in minecraft pe i hope there will be