#2: Sink

You need these blocks:

1. fence
2. short grey block

How to build:

Dig a one block hole in the ground right beside your bathroom wall. Put the short grey block in the hole. Add the fence two blocks above the hole.

#1: Toilet

You need these blocks:

1. white wool
2. short grey block
3. trapdoor

How to build:

Dig a one block hole in the ground. Add the short grey block in the hole. Make sure the block behind the hole is white wool. Tap the white wool block with the trapdoor to make a toilet seat.