For the Status Bar:
Open one window in internet explorer and enable the status bar,(view > status bar). Now right click on a blank part of one of the toolbars at the top and select "Lock the Toolbars". Hold down the Ctrl key and close the window via the "X" in the upper right corner.

For the taskbar:
After you have made the Taskbar the size you want,right click an empty part of it and select "Lock the Taskbar".