No the games are different and you can not play LBP on a LBP2.
online mode
You need a PS3 with an internet connection to the Playstation Network and a Playstation Network account. You also need the LittleBigPlanet 2 game
If a friend is online, just click join and if they accept you will go to their pod and you will play with them.
Yes on the Playstation Network
You do not play that game online except on the PlayStation network as is an exclusive PlayStation game you can not go online without the PS3 unless your game is a PSP LittleBigPlanet game
No.
You cannot play LittleBigPlanet on the computer, either online or with a disk. It is a PS3 exclusive. If you want to know more about the LittleBigPlanet community website lbp.me, it's not yet released.
No LittleBigPlanet 2 is designed exclusively for the PS3 and there is not a PC version of the game
no you need to purchase the new game
Only on the Playstation Network with a PSP or PS3 game
Yes on the Playstation Network