|Basic Drawing Materials|
Basically all you need is a pencil and paper!
You can start drawing with 2B pencil and copy or typing paper, which I find is suitable for practicing and sketching. I am of the mind that you shouldn't have to spend loads of money on materials to draw, although I am sure there are artists that would disagree with that.
Other things you will need are (preferably) a kneaded eraser, if that is not available, a school-type eraser will suffice. Also, it is good to have a portable pencil sharpener. You should try to keep your pencils sharpened as much as possible.
Vine charcoal is suitable for drawing; and is sold in boxes or containers depending on how much you want to have on hand. Vine charcoal is a thin stick, hence the word 'vine' in the name, each stick is about six inches long. You can find vine charcoal at any art materials store and hobby shops, or online through Dick Blick at the link below.
If you are a beginner, I believe the minimal expense for materials is the practical way to go. If in the future after you develop your skills and wish to take a more serious approach, there are many high quality drawing instruments and materials available.
If you are just beginning or just doodling and practicing, it makes no sense to use high grade art materials for such purposes.
If you develop drawing ability beyond the "doodler" to a more serious enthusiast, I recommend Dick Blick art materials, at http://www.dickblick.com/. Funny name, but great products for the artist!