The good news is you can actually draft an accurate pattern without most of those (even though having a small variety can be quite convenient). So, here is my list of essential tools that you will find useful for this particular particular pattern drafting project. If you are having difficulties sourcing some of them, post on our Flickr discussion board, hopefully someone can help with resources outside the US.
I love alphanumeric drafting paper - it has a very useful 1 in. grid that speeds up the process of drafting. However, you can also use a regular white or unbleached paper, preferably on a roll. Just make sure it is not too thin and can withstand multiple tracing. Also, it is nice when you can see through just a little, so you can see the markings underneath if you have to re-trace a pattern. For paper without grid it is nice to have a wide transparent ruler with a grid, like those patchwork rulers - it simplifies drawing perpendicular and parallel lines.
For tracing, I like using sketch paper roll (18 in. wide or wider), such as Bee Paper White Sketch Roll, 18-Inch by 50-Yards- it is semi-transparent and wide enough to fit most of the pattern pieces. I prefer to buy paper on a roll, which eliminated the need to iron out the creases, and is also more economical.
PENCILS, ERASER, SHARPENER
graphite pencil - I prefer softer ones, such as 2B or even 4B (keep them sharp), or a mechanical pencil (softer lead is more visible, 0,5mm is a good width)
two-three color pencils (for pattern correction and outlines)
Sharpener: any sharpener with a shavings container to keep things tidy
Sharpie, or any other permanent marker, for drawing final pattern outlines
Eraser: this Staedler Mars Plastic Eraser is nice as it is soft and does not leave a trace.
RULERS & MEASURES:
Transparent (acryl) ruler, 2 in. x 18 in (or 5 cm x 45 cm). There are similar ones in Europe, available on the UK Amazon site. This is a great ruler to have for pattern drafting, it allows you to draw parallel and perpendicular lines without trouble.
French curve is quite useful, but you can do without it if you are not afraid of drafting curves free hand. Actually, practice drafting curves and lines without a ruler - you will gain confidence and steady hand after only a few attempts.
Tape measure comes in handy not only for taking measurements, but for measuring and truing curved lines.
Yardstick is optional, any longer ruler would do in fact. The problem with many yardsticks in the US (I don't know for the rest of the world) is that there are not accurate (check them against a good drafting ruler and you will see what I mean). However, they are straight enough to draw a long line.
The bare minimum are fabric (far left) and paper (far right) scissors. On the picture above, you see my essentials set. I also like the 4 in. tailor point scissors (center left) for clipping, small cutting, removing basting etc - very versatile. Serrated scissors (center right) are especially good for cutting slippery fabrics (silk lining, for example).
Adhesive tape - regular transparent adhesive tape for office needs.
Tracing wheel with serrated edges, like this Clover Tracing Wheel one. Invest in a better quality if you use it a lot - I have to replace my cheap one after only a few months of use - it started making annoying squeaky noise.
Double Tracing Wheel (for adding seam allowances) is optional, for marking seam allowances. I prefer doing it with a transparent ruler.
ADDITIONAL SUPPLIES FOR MAKING A MUSLIN
Muslin, or unbleached cotton (calico) - you may need up to 6 yd. (6 m.) of it depending on the width. We will be making a muslin for a straight skirt and for the final skirt with a flounce, so this is a minimum. I usually buy entire roll at Jo-Ann's, with a 50% coupon. In some countries it is difficult to find muslin, so in this case just buy cheap cotton, preferably without print and not too dark so you can see markings.
Carbon paper - the waxed type is better, especially when you work with muslin, because markings are bright and don't fade. But, if you don't have access to it, use wax-free paper, or a permanent marker to transfer the pattern to your muslin.
Pins - my favorite type are the silk pins with glass heads, or any fine pins.
Pattern weights - professional weights can be quite expensive, so you can improvise and use cans or anything heavy as an alternative
Needle, thread, sewing machine
A zipper for the skirt muslin - any old zipper will do, this is meant for fitting.
That's more or less all on tools. Tonight and tomorrow I will upload a post on patterns and measurements. Please, ask questions and share your tips!