The colour of the covering has to be your choice. It can either be dark, so that you can see small brass and steel parts on it, or light, so that it helps illuminate the inside of movements via reflective light. The choice is yours, I suggest you try a small section of both to see which you get on with best. There are two main floor coverings used, Close pile carpet and Linoleum. With carpet the dropped parts don't roll far but are difficult to find.
Most people use fishing tackle boxes as portable tool stores, especially for house calls.
Some people have 2 sets of tools, one for taking to house calls and the other for workshop use. Others use the same set of tools for both, and have the tool chest positioned by their bench. It is always better if the tools have their own place in the box, and they are put back in the same place you have finished with them. Some people also had drill presses as well as cleaning machines. When setting up a cleaner, remember ammonia gives off fumes so allow for good ventilation.