They need to be bathed every 2 weeks if they are the long haired breed, once a month if they are short haired or as needed.
They will need nail timming to keep their nails from getting to long, This won't hurt the dog.
They also need their ears cleaned but you should bring it to a professional to have this done.
You can also get the Flea treatment done.
There are also a number of haircuts that you can have done to your dog.. But it would only be if you have the long haired breed.
They need to be brushed every day for the long haired and every day for the short haired but it is more important that the long haired ones be brushed everyday.

Frequently asked Questions
How long do they live? They can live from 11-18 years if they are properly taken care of and fed a healthy diet get plenty of excercise and are taken to the vet. regularly.
Are they good with children? Generally yes, but every dog is different. One who was brought up around children is more likely to be better mannered around children.
How much excercise do they require? These little dogs dont require a lot of excercise they have short bursts of energy and then they calm down.
Do they require special dog food? No, they eat the same kind of dog food as other dogs do they just dont eat as much.
Are they high strung and yappy? They can be. But most often it is with strangers whom they are not familiar with. With the one person they have bonded with they usually do not express these characteristics.
How do they react around other dogs? They generally tend to get along with dogs of their breed better than that of other dogs. But they will get a long with other dogs.