I have made two of the tomten's for children, but not the adult. Do a search on Ravelry if you haven't already. They have a few adult jackets. One of which has great instructions as to how their jacket was made. I believe too that www.schoolhousepress.com (E. Zimmermann's business, now ran by her daughter) has an instruction sheet that you can purchase which gives instructions for the adult tomten.
I'm Lightning57 on ravelry