You point on a block, if its not too far away, and left-click. If that doesn't work, you either have to press the right-button instead of left-button or go closer to the block you want to collect. There is also some blocks you have to mine with a pick, or else it would not drop itself!
Yes
You can collect discs in Minecraft to play music. You can either find them in dungeon chests or you can get one when a skeleton shoots a creeper and kills it.
Minecraft cd
Just mine it with a pickaxe.
Only with a diamond pickaxe.
You collect water with a bucket :) right click on a water source block to pick it up
You can fill the up with blocks or you can collect it using buckets.
You have to go to the nether and collect them.
It's the default mode of minecraft, you need to collect your own resources and hunt animals to get food to feed yourself.
To collect a dragon egg you need to push it with a piston, and then it will drop as an item.
By mining. You can easily find them in generated caves, and mountain sides.
CastleMiner Z for Xbox 360 is just like Minecraft