Survival mode is a mode in minecraft where you have to collect your own blocks, get your own food, and survive! Be careful at night because that's when monsters come out! If a monster attacks you, you will lose your lives and have to start over by losing the blocks you had in your possession. Basically, you have to "survive" on your own without unlimited supplies.
To fly in survival mode you need to craft the eye of ender
Yes.
There is nothing obligatory about minecraft; there is nothing you should get.
Yes.
NOPE
#$# $#$ #$# # = Gunpowder $ = Sand
You dont, unless you have the single player commands mod. Which i suggest you download. That is, if you want to enter cheat codes in survival mode minecraft.
Yes, in survival mode.
of course
It's the default mode of minecraft, you need to collect your own resources and hunt animals to get food to feed yourself.
276 in survival mode. 322 in creative mode.
You can't. There are two Minecraft demos that I know of: one on minecraft.net, and the PC Gamer demo. Both are locked in survival mode, and in survival mode there is no way to spawn mobs.