There is no earthly reason to change your coolant or brake fluid for at least a year and probably 2. As far as oil goes, Kowalski recommends 10/40, but with the caveat that it not be rated "Energy conserving". This has to do with additives that are not wet clutch friendly. Generally all automotive 10/40 oils are energy conserving. 20/50 oils are not. And Kowalski lists 10/50 and 20/50 as alternatives as long as it is warm enough out. Another really good choice is oil intended for diesel engines.........Shell Rotella and Chevron Delo are 2 examples. These oils come in 15/40, which splits the difference.
Personally, and opinions vary, I would use non-synthetic oil at least until 3k miles, just to be sure the rings have a chance to run in.
As far as synthetics go, synthetic diesel oil is a great choice.....it is available in 5/40. I myself use Mobil 1 15/50 automotive oil. It is cheap enough, and available at any Wallyworld.