| I could give you an average cost for around my location to paint those areas if I had some dimensions of the rooms with which to work. How much it will cost per square foot will depend on the average prices where you will be working.
One of the things that I do for a living is that I am a house painter. Around where I live and work, the going rate per square foot is about .70 cents for the application of two coats on a wall with a roller and doing the edges with a brush. And, that price is for an absolutely flat surface. For the trim, I use a brush. The rate for that is about $1.25 per linear foot for two coats. Neither of these prices include the cost of materials used, surface preparation, priming if needed or the paint used. For anything other than the painting, I would charge an hourly rate that I would like to make and figure that into my bid. As to the rates where you are, I don't know. If you let us know where you will be working, there might be some prices for around there that are listed on the Internet. | 
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