I bought Terraria a few days ago and I saw people with mohawks and an afro. Now I was wondering how I could get the same?
As of the latest version of Terraria on the PC, it is now possible to change your hairstyle in-game through the Stylist NPC who was introduced in 1.2.3.
The Stylist, like the Goblin Tinkerer and the Angler, must be found and freed before she can provide her service. She can be found in the Spider Nest mini biome, found in worlds generated in version 1.2 and above.
For the cost of 1 she will give you a hairstyle that could have been chosen at character creation, and for 5 she will give you a hairstyle that is exclusive to her. In addition, she can change your hair color for 1 and sells special hair dyes that have a wide variety of interesting effects for 5 - 15 .
You can buy a wig from the Clothier. After defeating skeletor the clothier (old man) should be selling you suit and wig. http://terraria.wikia.com/wiki/Clothier