Answer:
My first is twice in apple but not once in tart. My second is in liver but not in heart. My third is in giant and also in ghost. Whole I'm best when I am toast.
What peels like an onion but still remains whole?
When it was young, it had a tail. When it grew up, it had knees
I am a large mammal that lives in the ocean and sprays water from a blowhole. What am I?
It can be white or blue or black, Humped or have a horn. And when it talks it sings its menuets, as it's travelling the depths.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?