Jetta II, newcomer has a thousand questions…

Halli Hello! Drive a Jetta II, model Flair, year 91. 1.8l at 90 hp. I’m new here and have a few questions. But please don’t laugh about my ridiculous questions. Drive this car now for 1 year and am very excited! But everyone tells you something else. Now I found this forum and finally want to know what kind of car I drive at all. 1.) Drive a Jetta II, model Flair, year 91. 1.8l at 90 hp. 19E also stands somewhere. What is that? W Ofür is this “Flair”? Feel good? And then it’s supposed to be a GL model, or how? 2.) Does that bring what if I would fill up super? You hear something like “more power and still less consumption, better for ́n engine”. Is there anything there or is the stupid whimper? I mean, even though it has only 90 hp, it goes like nothing good. You depend so much on other equivalent cars with the machine. Would there be even more in the acceleration with Super? 3.) Did you see in the scrolling here? Some people are worried about their rear shelf. At that time I had absolutely no thoughts about it and cut 2x 25cm holes for boxes. That doesn’t do anything to the car, does it? 4.) Do you find somewhere in the net a driving report or something from the time then? Would you like to see what the car got for notes at that time. Have been looking soooooo a lot in the net, but nothing. 5.) Chiptuning? What’s that? I soldered somewhere my chip and that’s supposed to bring? Zuma The Jetta doesn’t have that much technology in it yet, or I’m wrong. That means I have no idea of motor tuning. Can someone write me how it works? So, for now, enough with it. Have a thousand more questions, but this is supposed to end here. Thank you very much in advance. 🙂