There is no limit.
This all depends on your maps. A copy of Minecraft that has no started maps is around 228KB. But after you start playing this will go up.
Not completely, many people make Minecraft maps for fun and for personal use without charging. They may ask for donations for the hard work they put into their maps, but many of the maps would not require a fee to use.
Custom maps in minecraft can usually be downloaded for free.
Survival maps are constantly being created by people in the community, so there's probably thousands of maps by now, or even more! If you want to look at some then some good websites are 'Planet Minecraft' or simply the Minecraft Forum.
i just got minecraft on ps3 and I am wondering how to get maps
No, it's not legal to sell Minecraft maps/mods.
you cant play agame in planet minecraft you can post in the forums download minecraft maps, post your minecraft maps, and change or post skins
One can download Scottland for Minecraft at the Minecraft World Map site. There are numerous Scottland maps and other maps one can download and use on their Minecraft account.
as Manny as your computers hard drive can hold. the actual game has no caps.
people have most likely made maps with many redstone made rides.
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.
There are most likely many. One of them is the lost custom map.