It's possible that anyone can reface their own cabinetry with a proper tutorial, but if you want the job done professionally or need custom wood work done, hiring or becoming a carpenter is your best bet. Becoming a carpenter takes a significant amount of training either through an apprenticeship or from a technical school.
If you decide to be a carpenter, you'll need to get the proper training. Many schools offer training in cabinet making, giving special training in refinishing and refacing the fixtures. You will learn how to shape different types of wood like oak, maple, walnut and beech wood. You will also learn how to install handles and fixtures on doors. You'll also learn how to cut laminate for counter tops, shape cupboards and design a proper pantry. Paint and resurfacing training for both the kitchen and the bathroom should also be made available to you.
If you decide to reface your kitchen without carpentry training, there are a plethora of online tutorials available to help you. Refacing can be a simple matter of refinishing or replacing the doors, in which you would simply change one for the other. Simply painting a bathroom vanity or staining kitchen fixtures to look like cherry wood can be a sufficient resurfacing project. However, if the materials are damaged and in need or repair, finding them at wholesale prices should make your project much easier. For more intricate remodeling projects, it's highly recommended that you receive the carpentry training referenced above to prevent injury or wasted materials.