1) To enter data into a spreadsheet cell, select the cell with the mouse or arrow keys and type the data. The data will appear in the formula bar and cell simultaneously but won't be saved until Enter or Tab is pressed.
2) Basic spreadsheet formulas involve entering data into cells, using the "=" sign to indicate a formula cell, and using cell references with operators like "+" to calculate values using data from other cells.
3) Data can be moved or copied within a spreadsheet using drag and drop with the mouse or copy/paste keyboard shortcuts. Columns can be resized by dragging the column border or double clicking to auto-fit contents.