It depends on what you do...
There is the light weight version of kali which uses the xfce desktop enviroment., and there is a version using gnome 3.
Gnome is pretty, but xfce is faster.
Both versions will all most for sure be able to run on your machine.
Link here
To install it you will need to make an bootable usb device (and back up any data on the machine), or cd.
I recomend the usb, and making it using rufus - link here
Now you will need to change your bios. To do this shut your pc down, and keep tapping some of the F* keys.
My bios key is F12, but i have seen some on others, even the delete key. Now change the boot order so usb is first. alternetivly try to find your boot device menu.
When you boot to the usb use the live cd option.
Now try to follow this tuturial -link here
Be careful and have fun!