To change the contrast on a Toshiba L855 laptop, you can adjust the display settings through the Windows operating system. Right-click on the desktop and select "Display settings," then scroll down to the "Advanced display settings" where you might find options for adjusting brightness and contrast. Alternatively, you can use the Toshiba Function keys, typically by pressing "Fn" along with an appropriate function key (like F2 or F3) to adjust brightness, which may indirectly affect contrast. If available, you can also access the graphics control panel (like Intel or NVIDIA) for more detailed settings.
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The straight and simple answer is no. Laptops are not akin to desktops in which they can be upgraded as one wishes. The integrated graphics in your Toshiba is the best you will get from that machine internally. The only other option you have is an external video adapter which attaches through USB but you will not get high-performance graphics out of that to a level at which you can play a game, for example. If you want a gaming laptop, then you need to get a gaming laptop.
For a laptop you cannot do that at all.
buy a new battery
What's the exactly model of your Toshiba, if it`s smart and you have WI-FI connection you can do through your laptop.
There is no way to change the input without a remote :(.
change the language input method from control panel to United States International
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