Let's start from minimum to maximum makeup.
Here is an eye brow pencil - Maybelline's Define A Brow. This product is sleek and slender; it is designed for fine lines, small short strokes to fill in the areas that are lacking hair. For some, this is all one needs.
A powder (eye shadow or from an eye brow kit) is used just like a pencil, to fill in the areas that have minimal to no hair. I use the powder over the pencil so it lasts longer (good wearability). I use MAC's Brown Down. I have dark brown hair (it almost looks black) so a brown is a good shade for me. The rule of thumb is to go one shade lighter than your natural brow color. The cream kit - Sonia Kashuk is a great product to build a shade that fits you. Use either the shadow or the cream - but not both. They cancel each other out. (Trust me, I've tired it!)
Clear and Tinted Eye Brow Gel - OK, this is the heavy hitter stuff!!!! Clear gel works well with light to little to no hair. Tinted gels work better for fuller brows that need taming. I have used the tinted gel, but I don't get a good result because I lack hair on the ends. The clear gel lays what little hair I have down and keeps it in place pretty much all day.
Now, now, now there are more products out there, but for a beginner, these products are more than enough and are suitable for a wide range of eye brow variations.
Check out my Eye Brow Tutorial
Eye Brow Tutorial