Answer:
I am a fruit with seed on the outside.
What can be as big as an elephant but weighs nothing?
I give people a huge fright but at the end I'm sweet. I normally celebrate at night when there's less heat.
I am the building with the most number of stories.
I'm blue at day and black at night. I do contain some creatures born and died. What am I?
When is it bad luck to see a black cat?