Errands are given by swift solutions, he pops up in chapter 4 in gold paw by the casino and can normally be found in every city except evermore, errands will earn you tokens of gratitude which can be traded for materials and most importantly new citizens.
Errands are really simple as long as you collect shiny things and fight you will find you always have enough TOG
Errands are collect this or trade this, nothing hard at all