Some extra materials might include rubber bands for holding glued pieces or hangers to aid in holding a model. Some other easily obtainable tools include scissors for cutting decals and nail clippers for cutting parts of off the sprue. I use toothpicks all the time for painting touchups and stirring paint. A dental pick will help you scrape paint off a surface that will be glued. Washing small plastic parts and soaking decals require small plastic conatiners.
Tweezers come in handy for adjusting and applying decals.
The basic modeling materials include paints, brushes and glues. Additional materials that will help you produce a detailed model include sandpaper, files and filler. Rubber bands can hold parts together while glueing. Many other common materials and tools not mentioned here can also be used while constructing a scale model. The table should have enough area to accomodate all the necessary tools and your model.