I programmed my esp-tm2 for each of the 8 zones to run for 12 minutes at 4am. will all 8 zones run at 4am for 12 minutes or run one after another?

They run sequentially not all at the same time. Your program will probably start at 4:00 a.m. by running zone 1 and then progress up through zone 8. Your program should end 96 minutes after it starts so that would be at 5:36 a.m. It will repeat this cycle for each day of the week that you set it to run that program (eg., Program # 1). Hope this is helpful.

Input is 120 VAC. Output is 24 VAC

Can you show me a picture of the power supply

It's an internal power supply that has a power cord connected to it for a direct plug-in installation. For a hardwired installation, simply remove the power cord from the transformer. Thank you