I don't think you need to flush anything just yet. Everything that has been filled up are all geniune fluids. I would leave things as is but if you really want to do it, do the engine oil (leave the coolant alone). With engine oil, i'm assuming you want to change to Mobil 1 or equivalent which would be 5-30W, this is the recommended spec and is what should be in your car now... i recon a normal oil and filter change should be enough. If you're pandentic, do the oil change now and do it again in a couple of weeks time, just to flush out the initial oil.
Remember to read the manuals before doing anything.