Farquea

I've never had a car painted so am only going off my research but would love some advice. I want to get my Civic looking nice and shiny, I was going to have a go at cleaning it and buying the buffers/polishes equipment to do so in the hope it looks good! But the paint isn't great in some areas and there is also some black paint sprayed on the body that i'd like to cover. I'm assuming if I look up car resprays I'll find shops but my question is can I take the car in and point out areas i'd like re-painted or is it better to do an all or nothing type job? If so any ball park figures to re-spray the whole car?