When you buy a halogen oven, you'll probably get everything that you need to get up and running. Most of these ovens come with a couple of racks, a couple of trays, tongs and an extender ring so that you can cook larger items. You won't need to buy anything else.
However, once you've been using your halogen oven for a while, you might want to experiment a little. In that case, you might want to have a look at some of the additional halogen oven accessories on the market. Some of them can let you try different recipes and different styles of cooking.
It's well worth a look. Here are some halogen oven accessories for you to cast your eye over. See if there's anything that takes your fancy.