I plan on wiring my building installing 5 outlet and 2 separate light switches and both light switches will have 2 lights on same switch including one in loft I wasw wondering how much 12/2 wiring and what size breakers and how many would I need

Provide a sketch showing the locations of all lights, switches, and receptacles.

Show height of ceiling.

List load of each receptacle, do you need one circuit for all receptalces or does each receptacle need a dedicated circuit?

Without this detail, no one here can give you a reasonable answer.

Also, keep in mind, in most, if not all states, you must be a licensed electrician to wire commercial space.

I plan on wiring my building installing 5 outlet and 2 seperate light switches and both light switches will have 2 lights on same switch including one in loft i wasw wondering how much 12/2 wiring and what size breakers and how many would i needJust reading this my first instinct is to tell you to hire a pro. He'll have plenty of material for the whole job.