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.
use an emitter
you cant
With a scoreboard
Make a good level
Make a really good level
Make a good level
Because you can make your own levels
Use options to make it a favorite
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