If you are talking about the Nintendo DS games, the entirety of the story happens in the Digital World. Right after the introductory cutscene you are already there.
It dosen't. Azulongmon is, in the first series one of the elemental gods. because of data they say, also in the series, that it was created when the digiworld was created.
Kari (Tai's younger sister) Enters the digital world in Digimon Adventure season 1 at the end of episode 39. Her first adventure starts in episode 40.
If you are referring to Melbourne, Australia, there are quite a few places to purchase an all in one printer. One such place is a store called Digiworld Computers. They are located on Latrobe Street and have a good selection of all in one printers.
First.. you have to buy a new digifarm. After that, you have to put 2 digimon of the same type in that farm. When you've got 5 to 10 digifarm reports, you heve to go back to the digifarm. Then calumon says that there is a digi-egg found in the farm. If you look in your digiegg gallery in your digivice menu, and then you see that you have a digi-egg. xD