I want to run normal 17 LCD monitor on laptop batteries can it be possible if yes how many laptop batteries will be used.
Yes it is possible, but you are going to have to either get an inverter to convert the battery voltage to 120 V AC (assuming that is your mains supply) Or you are going to have to adapt the monitor power supply to work of the 11 V (assuming the batter is 3 cell) of the battery. Neither of these should be undertaken lightly. How big a battery you need depends on the power consumption - I would expect something around the 50 W mark, but there could be quite a bit of variation between designs, and how long you want to run the display for. 50 W for 6 hours 300 Wh battery. that is probably about 6 standard laptop batteries.
