If you want a good board for less money, you're going to want a complete. If you want a much better board for more money, you're going to want to custom make yours. Keep in mind that choosing custom parts can actually save you money. If you're buying on a budget, get a Mini Logo or blank deck, cheap all-around wheels like Bones 100s, cheap bearings like Spitfire Cheap shots or Bones Reds, and any trucks that you can afford. Longboards can cost from $60-$500. They're good for bombing hills and riding smoothly, but very hard and limiting for tricks. They are great for beginners wanting to learn to skate. Classics can cost from $60-$400. A classic, cruiser, or mini cruiser is good for cruising. Street/verts can cost from $70-$200. They're the typical "skateboard", mostly made for tricks but good for a little bit of everything depending on the wheels.

TL;DR in Indonesian:
Tentukan apa yang akan dibeli. Tentukan apakah Anda menginginkan papan longboard, klasik, atau street/vert.