Replacing one cell with another and controlling its attributes

Two related questions:

1) What function can I use to replace a specific cell in spreadsheet 2 with what I type in a specific cell in spreadsheet 1 (e.g. type red in spreadsheet 1 in A1 and it will replace a blank cell A1 in spreadsheet 2 with red)? I have around a hundred spreadsheets which I need to name by typing a name in cell A1. Rather than doing this, I already have the names of the spreadsheets in a column.

2) Is there anyway to control the attributes of cells in another spreadsheet? E.g. change to bold, red and specific size font in cell A1 in spreadsheet 2 using cell A1 in spreadsheet 1.

I am not proficient at VBA or Macros so if the solution lies therin, I think I will try to manually enter the information.

Thank you.