Some DBA T2 slotted rotors and Bendix heavy duty or any other quality brand pad will be good.

Normal

Australian mechanic here, opinion from an affluent area, don’t know how it relates to the US, but markup on parts is 30%, fluids is 40% and hourly rate is $150AUD (about $100 US)

Always charge book time, unless it’s a good customer and it actually took less time. If you are going to charge less, make sure you show it as a discount on the invoice, do not just make the invoice less.