There are almost limitless choices from the camera manufacturers - and also from third party lens makers - such as Sigma, Tamron and Tokina. Most of the time you get great lenses from the manufacturer of the camera. You can save some money going with a third party lens. The only slight problem you may have is some compatibility issues with AF (Auto-focus) systems on the camera because third party manufacturer are not privy to the engineering data from the camera manufacturer.
But don't let this dissuade you from looking into third party lenses and checking out a few reviews. Although most of my lenses are by my camera manufacturer, one of my
favorite lenses is made by a third party manufacturer.
You will want to start out with a wide angle to normal zoom lens. Most of the kit lenses are in the 18-55mm range. This will allow you to shoot landscapes at the wide end (18mm) and then shoot some nice portraits at the normal end (55mm). If you shoot a lot of sports or wildlife, you may want to instead look at a lens that is more of a telephoto zoom, in the 70-200mm Range. This will also allow you to shoot some portrait close-ups (head and shoulders at 70mm) as well as zoom into subjects in the
distance.
The best value is to buy "zoom" lenses which allow you to zoom in or out with a single lens. But there are also fixed, or "prime", lenses. You cannot zoom with these (gotta use your feet) but they do offer better image quality in similar prices to zooms. A great value in most manufacturers' lines are the 50mm 1.8 lenses. They can be