In this room if you kill all the wolves you'll get some arrows.  The door is fake, you can blow it up with a bomb or hammer.  Use your Lens of Truth and look above the door to see a secret hole in the wall and a hookshot target.  Hookshot up there, step on the switch, and go through the door.  Follow the path around to another door and a small key.  Now go back to the room with the fake door and there's also a big gray block there.  With your new Silver Gauntlets from the Spirit Temple push the block forward until it falls down, then go through the door.  Kill the Shield-eater's here and you'll get some chests with rupees in them (one has 200 rupees).  If you open the chest on the pedestal you'll get frozen.  Mash buttons to break out of the ice.  Use your Lens and find the invisible chest in one of the little holes that the Shield-eater's were in.  Open it for the 7th key.  Now go all the way back to the first room again, and go through the Lion's mouth that's straight across from the entrance.  Take the right hand door and the next door after that.  Go down the
corridor on your right to get another key.  Go back and this time go through the other locked door and in this room, use your Lens and look at the ceiling to find a secret hole.  Climb up it via the fence and get a key up there.  Now just keep going through unlocking all the doors on that path and you'll get the Ice Arrows.

Spirit Temple Part 2, Adult Link:

Play the Requiem of Spirit to warp to the entrance of the Shadow Temple and go on in.  Go up the stairs and to the right is a big gray block.  Push it until it falls down and go into the next room.  Kill the eye laser thing and shoot the shock switch in the ceiling with an arrow.  Go through the door on the left.  Kill the wolves and play Zelda's Lullaby on the Triforce symbol to make a chest appear. Hookshot to the chest to get a Compass. Go back and now go through the door on the right.  Collect all the silver rupees in this next room.  Use you Hover Boots to get the one floating in the air.  Go through the door that opens.  Watch out for the Shield-eater and get a small key from the box.  Go back to the room with the shock switch on the ceiling and go through the locked door.

Watch out for flying pots and a Shield-eater that falls from the ceiling in this hallway.  Climb the wall and use your Lens to see an invisible hand monster.  Kill it, then use one of the wood poles sticking out of the statue to push it around to the third sun symbol from the left, opening the doorway.  Go through it and you're back in that giant statue room.  This time the small statue next to you is alive so watch it.  Now climb up the stairs and use your hookshot on the small treasure chest across the way from you.  Use your hammer on the switch to open the door on the ground level.  Go through this door, push the blocks out of your way, and hammer down the switch at the end to make a moving block for easy access between this room and the entrance room.  Go back to the big statue room and use your hookshot on the hookshot target above the door you came in from originally (as adult Link) to get access to the stairs again.  Climb up the stairs and jump onto the statue's hand with the Triforce symbol on it.  Play Zelda's Lullaby to make a chest appear in the statue's other hand.  If you've got good aim you can hookshot to it, or just drop down and climb the other stairs to jump over to it.  Inside is a key.