The Tool Shed is located in the lower left corner in your farm house. Even if you get the two house expansions, the Tool Shed will always be located in the same spot. The Tool Shed holds your tools and the seeds you buy from Daisy. To enter the tool inventory screen just stand next to the shed and press the A BUTTON on your Gameboy.
There are 20 different tools you can have, each one has it's own spot in the tool inventory. To swap out a tool or seeds that you have equipped currently, move the cursor to the tool you want and select it by pressing the A BUTTON. The cursor will then drop down to the rest of the tools. Select which one you want by pressing A again. If you want to select seeds you have to select the "NEXT" down at the bottom. You will then go to the seed inventory screen, which is laid out in the same way as the tool screen. Just pick what seed you want and press A. To exit the Tool Shed press the B BUTTON to cancel.
Most of your seeds you can obtain by going to Daisy's shop and buying them. You can obtain different seeds by trading with a friend who has another gender of farmer, getting them as birthday gifts, or letting your cat bring them home. There is only one tool that you may not be able to obtain, but the rest of them you should have by the end of the game.
Sickle/Super Sickle - The sickle is given to you by Bill at the very beginning. He also powers it up later in the game.
Hoe/Super Hoe - The hoe is given to you by Bill at the beginning. He will also power it up for you.
Ax/Super Ax - Given to you by Ken at the beginning. Daisy will power it up for you.
Hammer/Super Hammer - Ken gives this to you at the beginning. He will power it up for you as well.
Watering Can/Sprinkler - Receive from Daisy at the beginning. After you have shipped enough items you can buy the Sprinkler upgrade from Bill at his shop.
Fishing Pole - Buy from Bill.
Brush - Buy from Chet. Use on cows to raise their love level.
Milker - Buy from Bill. Used to obtain milk from adult cows.
Clippers - Buy from Bill. Used to harvest wool off of sheep.
Shampoo - Buy from Chet. Use like the brush but on sheep instead.
Scissors - Buy from Bill. Will appear after Ken builds the Hot House. You need to use them to harvest the flowers and herbs that grow in the Hot House.
Bug Net - Buy from Bill. Used to collect bug information for Mary's book.
Bell - Free from Chet after you buy your first cow. Use this to take the cows out to pasture.
Whistle - Free from Chet after you buy your first chicken. Use the Whistle to take the chickens out to pasture. You can also carry the chickens in and out.
Horn - Free from Chet when you buy your first sheep. Use it to take the sheep out to pasture.
Miracle Glove - See Treasure Map Quest. Use it instead of the horse to harvest crops.
Cow Medicine - Buy from Chet. Use if your cows have green faces.
Cow M.Potion - Buy from Chet. Use to make cows pregnant.
Sheep Medicine - Buy from Chet. Use if your sheep are sick and have green faces.
Sheep M.Potion - Buy from Chet. Use to get sheep pregnant.