Design for 2.7m garage brick wall

Looking at 2 options for stand alone garage, thinking of either:
1. Building stud framework to put trusses on and brick veneer the walls, what are the requirements for the brickwork - distance between engaged piers, and size of egaged piers 230 or 350?
2. If i built a brickwall for the trusses to sit on top what brick wall would the distance between engaged piers, and size of egaged piers 230 or 35 ? and use timber between the piers to sit the trusses on?
Garage size 6x6m, 5.2 opening at the front.
3. What footing sizes needed?