Roger,
Everything Vaughn said above is good. Personally, I'd start with the Ballpoint Twist Pen (called Slimline by other makers) above the European style you chose. The Euro requires you turn a tenon to get the center band to fit. For a beginning pen turner that can be a frustrating experience. The Ballpoint Twist is a very forgiving pen kit, requires the least hardware, and is very versatile and less expensive.
If you click on the link for one of the pens on page 152 then scroll down to the pricing area, you'll see links for Acc (accessories), Tech (technical help for making this pen), and Inst (instructions). Before you decide what pen you want to turn, look through the instructions to see if you want to do that and look through the accessories to see what else you'll need.
On the next page in the catalog (top right), you'll need item J, the 7mm mandrel. It comes with some spacers and has a MT2 connection on the headstock end. On the tailstock end, it's designed so you tighten the blanks on the mandrel with the brass nut on the end. The point of your live center fits in an indent in the end of the mandrel to hold it in place. If you turn many pens, this will wear off the tip of your live center. If you decide you like turning pens, I recommend a Mandrel Saver like you see here:
http://www.woodturningz.com/PSI-Mandrel-Saver2?sk=mandrel+saver . Saves your live center.
One of the most frustrating things I learned after I started turning pens is that several different manufacturers make very similar pens, but they're not exactly the same. There are small differences that require you to buy the bushings for the specific pen kit you buy because the ones from a similar kit don't fit. I've got a good list of people I buy pen kits and such from. If you're interested, email me and I'll be glad to share.
Get ready to get hooked. Pens are fun to do and you're done quickly, no waiting 3 months while a first turned blank dries so you can turn it again. Once you get the hang of it, you'll be turning them out in short order. They are fun to use and great gifts as well as good sellers. Enjoy
Steve