This whole site has many things for your new puppy, but to make things even easier for you, we have drawn up a list of items which are absolutely essential for you to give your puppy a great homecoming.
Most of these are available on this site, but wherever you buy them from, make sure you have everything you need.

These include:-

General.

Food.
Feeding and water bowls.
Puppy collar/adult collar & lead
Name tag showing puppy's name, your details, and perhaps your vet's telephone number.
Chews and teething aids (to be used under supervision).
Poo bags.
Toilet training pads.
Suitable toys.
Training treats (check they are suitable for puppies as some are not suitable until puppies reach 6 to 12 months).
Grooming equipment - brushes, combs, towels etc.
Claw clippers and scissors.
Shampoo especially formulated for puppies.
A book on general puppy/dog ownership and training.

For your home and garden:-

Puppy play pen
Dog training crate.
Basket/bed, bedding and spare covers.
Furniture sheets or covers.
Outside kennel or kennel run if you are going to keep your dog outside.

For the car:-

Dog crate or guard, or
A dog travel harness where a crate is not practical.
Travel feed bowls.
Blankets, covers,  and vetbeds.