What does below rebus means ?

I am quite hot but become too cold if you remove the first two letters. What am I?

Can you find the missing piece of the Porsche?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

If your uncle’s sister is not your aunt, what relation is she to you?

Look at the picture and find out which square is not linked with any of the other squares.