There are lots of things to do in the Market but you can come back later if you like. If you head straight through the Market, you'll come to the castle. First, talk to the young girl standing in the middle of all the action going on around you. She will tell you that her father went to the castle to make a delivery. If you want to have a little fun at the Market first, you will find a lot of places to visit there.

The Bazaar
The Bazaar is a weapons and armor store. You may find a good discount here.

Item--Cost
Arrows-10 for 20 Rupees
Arrows-30 for 60 Rupees
Arrows-50 for 90 Rupees
Bombs-5 for 35 Rupees
Deku Nut-5 for 15 Rupees
Deku Stick-10 Rupees
Hylian Shield-80 Rupees (60 Rupees with the discount from the guard at Death Mountain Trail)
Recovery Heart-10 Rupees

Potion Shop
You can buy many useful items here but you must have a bottle.

Item-Cost
Blue Fire-300 Rupees
Bottle of Bugs-50 Rupees
Deku Nut-5 for 15 Rupees
Fairy's Spirit-50 Rupees
Fish-200 Rupees
Green Potion-30 Rupees
Poe-30 Rupees
Red Potion-30 Rupees

Happy Mask Shop
This store is kind of fun. You can borrow masks and wear them. Talk to certain people while wearing them to see what kind of reaction you get. You can follow a certain sequence of trading the masks to the people who want them and you can earn the Mask of Truth which allows you to speak to the stones that tell you the time when you hit them. See the Mask Info in my How To section.

Bombchu Shop
This shop is only open at night. You buy Bombchus here. Bombchus are a very cool type of bomb. When you set them down, they run into something or just go till their fuse is out. Unfortunately, the shop only has a limited quantity of them so once they're gone...they're gone.

Item-Cost
Bombchu-10 for 100 Rupees
Bombchu-20 for 180 Rupees

Shooting Gallery
If you need a bigger bullet bag, this is place to come. Hit every rupee with your Slingshot and you'll earn a new bullet bag. It only costs 20 Rupees per try.

Bombchu Bowling Alley
This is a fun game but hard and expensive! You can only play after you get the Bomb Bag from Dodongo's Cavern though. You can win great prizes here like a Piece of Heart or a bigger Bomb Bag! It costs 30 Rupees per game!

Treasure Box Shop
Do you feel lucky? Hope so cause if you want to win this game, you have to be very lucky! Pay the attendant 10 Rupees and you'll receive a small key. Enter the locked door and pick a chest. If you find a small key, move to the next and so on. If you find a rupee or something other than a small key, you lost. Head back to the start. You would be better off coming back after you get the Eye of Truth so you can cheat! The first time you win, you'll get a Piece of Heart and a purple Rupees every time thereafter.

Pooch Ladys' House
In the back of the Market, enter a house and talk to a lady who is missing her dog. Find him and return him to her. This is a free game. If you can find the white dog, bring it back to the lady and you'll get a Piece of Heart.