What do you call a cow with no legs? Hint: two words but don't put a space between them

I'm a mammal known for my black and white suit, But my name suggests a deadly pursuit. What am I?

A delicate strip that wraps with grace, binding gifts or winning the race. Twirl it in your hair, or tie your laces with care.

I'm skinny and long with a wooden coat, I write down words and math you note. I leave dark marks that you can erase, what am I, helping in every case?

If you come to the sea you'll have a whale of a time, Expensive by boat; on shore won't cost a dime, You'll hear me breathe as my fin breaks the surface, I may look like a shark, I swear we don't do it on porpoise!