Click the arrow where the icons normally are and you will see them there and if you click customize you can get them back on the bar.
you need to go into the properties for the wireless connection and check to box "show icon in notification are when connected". Also check taskbar properties- uncheck "hide inactive icons"
is this the task bar
You can pull down the notification bar with any app open. You don't have to be at the home screen.
I have pointed to the icon in blue in the picture below
Hold down the cntl key and drag the icon to the quick launch bar. This will copy the icon. If you don't hold the cntl key it will move the icon to the quick launch bar.
Unplug or Eject Hardware icon in the Notification Area
For Windows, it is usually on the lower right side of your task bar in the notification area or sometimes they call it system tray left side of your time and date if it displayed. For Apple, it can be found in the Dock area. Hope this help.
There is no way of knowing who looked at your google+ profile page
Notification Area of the Task Bar.
Notification area or tray
Since I am unable to see your notification bar, I am unable to identify the symbol you are referring to. Describing a symbol in detail will help us identify what you are referring to, as well as knowing the website that you are on.
There is no Gmail Toolbar, There is the Google Toolbar.