Every cat owner needs some basic grooming supplies. A metal comb, sturdy stainless-steel combs with wide-set, round teeth are widely available. A brush with bristles that look like dozens of tiny bent nails. They resemble the rasps on a cat's tongue and serve the same purpose in grooming. Most cats enjoy the sensation of the brushing unless, of course, you hit a tangle or mat.
I know it sounds crazy to bathe a cat, but they benefit from it, when they are so dirty that they cannot clean themselves, when they have a substance on their fur that it would not be healthy for them to lick off or when there is a medical reason for a bath.
Usually a cat bath is a two person job, one to help restrain and one to bathe. Before the actual bath, brush your cat all over to remove any tangles from his coat. Run some warm water into the tub or sink, lay in the towel. The towel is for the cat to grip its claws into, instead of you. Gently place your cat in the water, be sure to keep a secure grip on him!
Use a gentle shampoo made just for cats. Thoroughly rinse out the shampoo, any left behind could irritate your cat's skin. Wrap your cat in a towel rubbing will cause tangles, so just keep patting. Use a soft brush to smooth your cat's coat.
A strongly recommend getting your cat use to a grooming routine as soon can. The younger you can have them be familiar and comfortable with you helping to groom them, the easier it will be for you.