Should I get the Female its needles? She should be vaccinated, yes, but more importantly is to have them tested for feline leukemia and feline aids as these are contagious from one cat to the next.

What is the best way to introduce the both? SLOWLY! keep them separated at first. After the new cat settles in her own new space, allow them to meet ONLY while being supervised.

Do cats share litter boxs? Yes, but you should still have more than one when you have more than one cat.

How will I know if my cat likes the company of the other cat?How long does it usually take. Most cats will enjoy company of their own kind. But the time it takes for the friendships to bloom can vary from a few days to weeks or even months. All cats are different