A tandoor is a Middle-Eastern clay oven used for baking breads and then later used in the preparation of main dishes. In Iran the tandoor is used for baking barbari (a nationally acclaimed thick and crusty bread) and lavash (a soft thin flatbread); both breads are cooked on the interior walls of the tandoor (thus their flat shape).
A set of metal kabab skewers are essential if you are going to try making kababs at home. The long metal skewer is somewhat akin to a needle, with a sharp point at one end for skewering the meat and an eye at the other end for ease of holding the skewer when removing meat. You can also purchase disposable wooden skewers for the purpose although metal is better.