howdo I get into the 6th temple .

Do you mean the Temple of Time? Just warp to the Northern parts of the woods. That Rustle guy or whatever his name is will summon a golden chicken and tell you to use it to access the Sacred Grove. You should already know because you did it before as a wolf to get the master sword. This time you have to use the bommerang to turn the spinning bridges to your direction. Repeat with the second bridge and hop across the remaining gaps to enter.

Just like before, you have to chase and hunt down the Skull Kid, except it's much harder to chase and find him, and that you need to use the Hero's Bow to kill him. Then you can just push a giant block ahead so you can gain access here in the future. Go to the sword pedestal and plunge the master sword into the pedestal to summon a set of stairs. Exit and fight off the shadow beasts to create a portal to warp back here in the future. Now go to the area with that block and now open the broken door to go back in time and ... Viola! You are now inside.