very funny xd, the 4 digit code 4 the painting and the arrow puzzle to unlock the third cabinet under the sink
You need to find all of the red numbers-
one of them is hidden on the toilet paper roll
one of them his hidden in the pumpkin cabinet
one of them is hidden in the gold box
one of them is hidden under the lid of the box next to the portrait
then, you can use this information along with the plate inside the right cabinet.
HINT: the numbers you find around the room are ABOVE the lines, while the numbers on the plate are BELOW the lines...