At first when you leave it is helpful to limit the area in which the dog is allowed to roam. Their overall desire to please makes this transition easy and they will quickly learn to ask to go outside to relieve themselves. Because they are handled constantly, racing greyhounds walk nicely on a leash and have good manners. They don't have true obedience training but are quick to learn what you expect from them. It helps if you don't expect it to all come at once.
Retirement is a big transition.
Toys are nice, but the most important thing is lots of love. In pursuit of prey at 45 miles an hour they are unaware of traffic or other dangers, plus they can become lost. They need a low protein, low fat diet to keep fit and trim and cannot be exposed to chemicals or insecticides. All of these facts are explained in full detail as you pursue adoption. The love they reward you with more than offsets and special requirements.