Equipment your puppy will need
Most experts now agree that a puppy den (a complete cage) or a puppy pen (an enclosure with open top and bottom) is essential. Although more expensive, the den is more versatile as it is can be used for travelling too. The den provides a safe and secure place for your puppy. It is also helpful for house-training. Add a blanket or some fleecy bedding to keep him warm and comfortable.
Toys of the right size are essential - choose some for your pup to play with when he is alone (such as food-filled toys or chew toys) and some he can play with you (tug toys). You'll also require a soft collar and lead plus an identity tag, as well as food and water bowls. Choose a soft brush and a mild shampoo so you can gradually introduce him to grooming and baths.
Buy a bed big enough to allow for your puppy's growth, and it might be worth avoiding either foam or wicker beds at least until they've grown out of their chewing stage. A travel crate is also worth considering.
Water/food bowls should be either stainless steel or ceramic as they wash much easier and are more germ resistant than plastic bowls. It is important that there is always fresh water available for your dog.
Other useful products
Adaptil, (formally called D.A.P dog appeasing pheromone) diffusers are a useful option, especially if dealing with an older/rescued dog or if there are other pets in the house. Also worth considering is an anti-chew spray to discourage unwanted nibbling on furniture and household objects.
It's inevitable that there will be a few accidents in the early stages of any training and housebreaking regime, so having an enzyme based stain and odour remover will help clear up the stain whilst discouraging your pup from soiling in the same spot again.