Although I am tempted to not take this post seriously, I will restrain myself for now.
First, read this and make sure you click on all the little green links in there (and read those pages too). Second, come back here and ask us again if you need anything clarified.
As the short and easy answer: Start with a pipe. Learn to tune that. Then maybe get a bigger carb. Play with your gearing. Tune your clutch. Do the little stuff. Then get a kit. If you just get the kit now, you're going to be back here posting, wondering why it doesn't work, or why "the pedals don't move anymore", and you'll just have to learn (and read about) all of this stuff then if you want to fix it and make it work properly.