It's the default mode of minecraft, you need to collect your own resources and hunt animals to get food to feed yourself.
To fly in survival mode you need to craft the eye of ender
#$# $#$ #$# # = Gunpowder $ = Sand
yes, in the demo
There are many tutorials on Youtube.
It's not possible to receive/collect all of the blocks or items in Minecraft using survival mode. You can gather most of them however by mining, roaming, and finding dungeons and abandoned mine-shafts.
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
of course
Yes, in survival mode.
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.
276 in survival mode. 322 in creative mode.
YES
Use a pickaxe