For example, if you live in a ground floor dwelling, then the puppy may be an adult before he experiences a long flight of stairs. When the dog then puts the brakes on and refuses to put one paw in front of the other, then you're stuck. It's not physically possible to carry a dog of that size up steps (and if you did manage it then you'd hurt yourself.) So it's vitally important to teach steps as a skill when the puppy is still young enough to take them in his stride (pardon the pun.)
Take advantage of the puppy's socialization period where he learns rapidly, and introduce stairs before he reaches 18 weeks of age (ideally, much earlier than this, at around 12 weeks.) That way the puppy will learn that stairs are a regular part of life and grow up confident in going up and down.
It might be when he's fully grown he'll be too big to pick up, so climbing stairs in a calm, controlled manner is a vital skill for a pup to learn. This is best done by encouraging him, so that he links stairs to good things, rather than seeing them as something to be fearful of. It's also salient to remember that the commonest causes of dogs being fearful on stairs is that they had a bad experience in the past or they plain haven't been exposed to stairs during their socialization period.
Avoid this situation and by incorporating training on steps and stairs from a young age.
You don't need special equipment when building a pup's confidence and coordination to use steps. However, a few things such as tasty treats are going to help make the task fun.