I would say, that if you haven't been riding a while, then you really need to figure out what you want to do with your money and what your budget is. There are excellent complete bikes that will get you riding for a bargain, then you can upgrade stuff as you need.
A killer complete flatland bike is going to run over $1,000 and that's why it is hard to recommend parts if you don't have that to spend.
1. Fork: Odyssey Flatland. This fork is killer with a great warranty and excellent design.
2. Pedals: KHE Stimulator - Nylon lasts forever when you don't grind them and they grip really well but won't kill your shins should... or more accurately, WHEN they hit you in the leg.
3. Cranks: Profile Elite flatland. Nothing better on the face of the earth. More realistic? Regular Profiles or Odyssey. Either way, 3-piece cranks will set you back some coinage if you want some decent quality.
4. Wheelset - Pick one from the Flatland Fuel website and make sure it has a Nankai freecoaster and chrome plated rims. That's it. The HB Momentums look great... Just a couple hundred right?
5. Pegs are personal preference. If they are on flatland fuel and they look good to you, they are fine. I personally like the Arestic Sirencers.
It adds up quick and if you don't have any components to move over from another bike, you will hit $1K before you know it. Good luck!