you need this skill for your doll:
Summoning dolls - special - extra skill slot => your char must have it.
then go into the doll's skill table, for each skill pt you put into this special skill of your char => you transfered it to the doll.
http://www.kiya1.de/beyond/actgeneral/Dollskilltransf10.jpg => see? <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" /> <img src="/ubbthreads/images/graemlins/wave.gif" alt="" />
Level 1 in alchemy is sufficient for small potions. If you want your doll to create potions - it HAS to be in either single/leading mode AND have the plants in its inventory as well.
Kiya