Look around the site for all of your questions. The answers are there. Promise.
Your style is the best style. "Punk" is about making your own everything. Clothes, hair style, color, and most importantly personality. Create your own. It is even possible to create your own hair dye -just get creative.
Hey, no need for sewing machines. I sew and embroider by hand. Sewing is pretty badass when you actually take the time to learn it, instead of throwing in a few weak stitches here and there =D.
Hair dye depends on your hair and your preferences. The level of maintenance you're willing to work with, experience, tricks and tips you know all factor into how and what. I'm a fan of Punky Colour, Special Effects, and RAW.