It is essential before riding to own proper equipment. The typical rider will first need to have snow pants. Pictured below are a few examples of what proper snow boarding pants are.
The next item every new rider should own is a heavy, waterproof, wind resistant jacket. Pictured below are some examples of proper snow boarding jackets.
The final pieces of equipment a rider will need is goggles and boots. There are several different types of boots and goggles available. It does not make too much of a difference what type of goggles you get, however there are many different types of boots. If you plan on using a alpine or racing board it will be very important to use firm boots, for just about every other type of snow boarding a soft boot will be necessary. Pictured below are a pair of soft boots on the left and a pair of firm boots on the right.
Most of these items can be purchased at major sports stores and online.
Some good web sites to consider when purchasing equipment are: