Shift+D will dupe it.Then move your mouse and click where you want the dupe to be.
Ctrl - C is copy. Ctrl - V is paste. Try to find a duplicate command.
No, there isn't.
1- Press Shift F1.2- Go to the folder where the .blend file is, and click on it.You should see a list like this (or something similar): . .. Armature Brush Camera Image Lamp Material Mesh Object Scene Text World3- Click on Object. This should bring up another list of all the objects in the blender file.4- Click on the object you want to import. If you want to import several objects, right click on them instead. 5- Press the "Load Library" button.