Sorry, but I don't understand your request.
You want to format a cell and have that same format applied to selected cells and columns. But when you already selected those cell and columns, the format will also be applied to those cells.
So, for example, you want the format applied to A1 automatically be applied to B10, E5 and column G. Then Select A1, B10, E5 and column G, apply format and you are done.
Am I misunderstanding?