You need to hold the Function key (marked Fn) and then press F5 and F11 to use as function keys. This can be reversed in the Keyboard section of System Preferences by ticking the Use F1, F2 etc. as standard function keys option; the Fn key will then control the brightness and volume keys.
Go to the Options tab (usually grey, with a picture of cogs or a wrench--but who knows, with all the updates) and click what is currently (Feb 4th 2012) the top left box, entitled "Options for changing your graphics settings." This tab allows you to mess with fullscreen, widescreen, brightness, and other graphics such as shadows and decorations.
A dedicated Minecraft server is a server where you can play original Minecraft. Usually without plugins or mods.
Placing items in Minecraft is usually done with the right mouse button.
Typically, Minecraft usually uses 300MB + RAM - Usually about 600MB, but it is automatically allocated up to 900MB RAM (if your computer can handle that). Basically, the more RAM you have, the better Minecraft will run.
There are no dogs in Minecraft, although there are wolves. Wolves are found usually in planes or forests. They spawn on grass and dirt.
The brightness setting is usually hardware. If you have a PC with a seperate monitor, the brightness settings will be on the monitor, sometimes as an individual button or in the menu settings. If you have a laptop with a built-in display, the brightness setting is usually changed either with software supplied by the manufacturer, or by shortcut keys on the keyboard. For example on my Toshiba laptop I can change the brightness with a specific button on the case for that purpose, or using the "Fn+F6/Fn+F7" shortcuts, or by using the mouse to select the feature from the onscreen menu. On my PC I use the "Menu" and arrow buttons on my screen to change it. Most handheld devices like tablets and mobile phones also have brightness settings, they will be under the "settings" menu on the device although you can usually install a widget onto the device to make changing the setting easier to do. Hope this helps!
Go to the Options tab (usually grey, with a picture of cogs or a wrench--but who knows, with all the updates) and click what is currently (Feb 4th 2012) the top left box, entitled "Options for changing your graphics settings." This tab allows you to mess with fullscreen, widescreen, brightness, and other graphics such as shadows and decorations.
usually theres a fullscreen option for downloaded games and ocasionally for internet games
Your question wording is confusing, but I will attempt to guess what you mean and answer it. Some (but not all) keyboards have a backlight to help you identify the keys in low lighting conditions. On such keyboards a pair of keys (usually multifunction "f keys") are used to adjust the brightness of this backlight to meet the user's needs. That is the purpose of the key on the keyboard that you are asking about.
Electric keyboard usually refers to the keyboard of an electric piano. "Keyboard" is a generic word that can refer to an electric piano, an acoustic piano, a typerwriter keyboard, a computer keyboard, etc.
Mouse and keyboard are you main input devices, there are others such as webcams and tablets.
the brightness of a star is called it's magnitude
It is usually on the key above the Enter (or Return) key on the keyboard.
A dedicated Minecraft server is a server where you can play original Minecraft. Usually without plugins or mods.
Custom maps in minecraft can usually be downloaded for free.
As they get hotter, they usually get brighter.
A good gaming keyboard usually costs around $60 dollars. Prices will vary depending on the brand, though a Logitech gaming keyboard can usually be bought for around that price.