just put two eyes, two legs, a mouth (sticker or magic,) and a brain to a material. If is a bad guy you can lethalise it. If it is on LBP1 you will get the Frankenstein Trophy (Silver)
You cannot.
you cant
use an emitter
With a scoreboard
Make a good level
Make a really good level
Use options to make it a favorite
Make a good level
Because you can make your own levels
You just go to create mode and make anything
Hard question, but in my opinion, yes. In ModnationRacers you can make better mods and tracks + it's easier to make karts. But in LittleBigPlanet, you can create whole levels instead of tracks.
Depends on how many PSN accounts you have