The Finder icon should reappear in the Dock after restarting the computer.
I doubt very seriously you actually deleted Safari. You may have deleted the shortcut icon but not the program. Open applications or finder and I bet it is still there. If so, just drag the icon to the dock.
Don't touch it; don't drag it to the desktop. and if you do, just go to FINDER, APPLICATIONS, then drag "dashboard" back onto the dock. == ==
If it isn't on your dock, go to your finder, search imovie, drag it to your dock, and click it on your dock.
In default settings, it will be on your dock. The icon is a guitar. If it was removed from your dock, search for it in the finder.
On a mac go to the blue apple and click. Force quit the operating system, not finder. In my case I use Firefox. Then go to the dock and click the system back on.
Click Applications in the Dock or open the Finder and click Applications on the left.
Open finder, applications , imovie drag to your dock! If you have to many already there move some!
Widgets come with these mac softwares: 10.4 (Tiger) and 10.5 (Leopard). These softwares contain "widgets". Upon installation of the software, or if you haven't moved any of the dock icons around, you should see the finder symbol on the dock, and immediately to the right of the finder symbol on the dock is a black clock thing, which is the icon for widgets. They do not come with 10.3 (Panther) or lower.
From the Desktops Finder menu select Go and then select Applications, or use the three keyboard shortcut keys Command, A and Shift. Alternatively open a Finder window, from the Finder icon at the left hand end of the Dock, and Applications should be shown in the window's side bar or Double click on the hard disc's icon and then the Applications folder icon.
Click on the Finder-icon in your dock. Your HD is visible at the top of the side bar.
if you need to find files you need to use Finder, Its the First Icon in the Dock and Its really easy to use!
The Trash Can should be a permanent feature, like the Finder icon at the other end, on the Dock. You can dig down to: /System/Library/CoreServices/Dock.app/Contents/MacOS/Dock and hack the Trash settings to give you a Remove from Dock option when you click and hold on the icon, like any other application, but this will break the Code Signing and will be reset when the computer is restarted again restoring the Trash Can to its rightful place. It is not clear what is trying to be achieved but would a Simple Finder set up help? (See links below)