If you really want a big laptop, then consider the 20-inch Dell. It's a beast, with a huge, huge screen. Otherwise, there's many laptops out there that would work, such as the Dell Studio 17 with a 1920x1200 screen.
The most important aspect of a PC laptop for photography is the color range and screen quality. Dell laptops are usually consider the best in these areas.
No. Kuz it's only an "Local Area Conection" !
You can you use the program which is called RealVNC, UltraVNC, Remote Office manager, RAdmin.
Visit the KVM website (see the link).
I would suggest you buy a docking station for your laptop. This will provide all of the necessary I/O ports for the PC to PC KVM switches.
For Laptop: open it up, checking the cable whether is lose or not: might need a technical repair if you damaged the screen, like dropping it on the floor. For desktop: Make sure the VGA cable is not lose, its the one that connects your monitor onto your PC, if you have damage it somehow, you can get a repair or buy a new one. It might be the resolution problem, try change the resolution to recommended or highest in screen resolution setting, this apply to desktop and laptop. On the desktop monitor some of it will contain button on the monitor, you can try adjust resolution on that.
plug display cable on laptop with the broken screen's CPU
Yes.
Vedio ram
No offense, But do your self a favor and get a desktop gaming PC not a laptop. You would get a better PC for less money
No. You don't need a touch screen to use Windows 8. It will work just like a regular PC or laptop.
The PC is prolly best for your needs due to it's versatility.