Like above said, you won't be charging the homeowner an hourly rate, unless its a small day-day and half job. Those are usually for an established client where they trust you. You will be giving a full job proposal that will include all your labor, materials, overhead, and profit. I would recommend you look into proposal, contract, change order, and other forms you might need.
A proposal is basically the job scope written down, what materials you will use, methods that may be unique, equipment needed, then a total price. I can't stress this enough, do not break down your costs for a customer. Waste of time on your part and not a customer you want as a client.
For the labor portion, you will have these costs (wage+workers comp%+payroll tax%+profit%) Yours may vary, but my costs are about 50% of wage. So a guy making $30/hr, I need to charge $45 to cover his costs. When you are looking at a job to bid, there are many methods. I use square foot cost method, where as I measure the perimeter of a house x height. My charges range from $1.25-3.00/sq ft. depending on the spec and scope. Then I add items, like doors, windows, metals, shutters, anything outside of prep, mask, prime, spray main house. I like this method as I am accounting for any item that will be painted. I may overcharge or undercharge an item, but it is being paid for. Adjust as needed as you get more experience. As you get a few jobs, track man hours and materials to get an idea how those main costs act as a percent of your total job. If those two costs are 75% or higher than the job total, you need to bid higher, work faster, just don't use cheaper materials!! You will have a tough time paying yourself and partner, paying your overhead costs if you are just covering job costs. GL to you.
