1. You give each layer the "print scale" desired. when you select the print command the driver should present you with the available choice of sheet sizes.
2. select the line tool, click to start the line, tab into the edit window, type "4'" move the mouse in the direction you want the line to grow and click.
3. Layout tabs in Acad represent paperspace viewports for the purpose of printing specific drawing areas to a specific scale - VW has no equal function, use the layer scale and sheets.
4. ACAD is 1:1, VW is "print scale by layer.
Note: All of the above and much more is covered in the manual.
Hope this gets you started!