The kitten will need these immediately in case he/she is thirsty or hungry on arrival. The dishes should be quite heavy so the kitten doesn't end up pushing them around and so they don't tip over! The water will need changing every day and the kitten will need to be fed small amounts about 4 times per day. Once the kitten reaches 6 months this can be changed to larger portions twice a day. The breeder should have given you information about the kittens diet requirements and the types of foods they are used to.
Combing your kittens' fur is particularly important if he/she is a long hair breed such as Persian. Regular grooming is important to prevent the fur from becoming tangled and to make sure your kitty looks great! Some cats do not require constant grooming, it all depends on the type of fur they have. It is best to keep a comb or brush handy in case the kitten gets something stuck in its fur or rolls in something! Regular stroking will help remove dirt and dead hair.
Kittens need toys to stimulate their minds and help keep them active throughout the day. There are loads of different varieties available; balls, bells, mice or string, remember cats love to chase thing so anything that involves them running or looking for something is good. You can even make your own toys, one of the best I know of is to tie a piece of paper to the end of some string and run around letting the kitten chase after it - trust me they'll love it!