You can't. LBP2 has new tools not in the original, so it isn't backwards compatible. HOWEVER, both game's stats are tied to the same account giving you credit for the levels you make in their games respectively and earning trophies for successes in the other. I got like 10 trophies when I first played LBP2 because of my levels. lol
no you need to purchase the new game
NO
no they do not
It has 50 levels the story is great go buy lbp 2
online mode
There used to be a way, by hearting it, but it's been patched
yes, go into options and find update data
There are no water materials in LittleBigPlanet 2, you can however still flood your own levels with water. It is simply not classed as a material.
Yes, if you say you would like to import data from little big planet 1, when you put the 2nd game in.
if your talking online and all that you can't. new levels are being made for lbp 1&2 every week
There is no LBP '1' Just LittleBigPlanet or LBP and LittleBigPlanet 2 or LBP 2. Both have many players creating new content
yes, all of your items, the online levels, and many other things come along as well.