How can i burning the firmware to PIC16LF1459-I/SS?

Microchip PICKIT3? Thank you.
Yes, that will work fine. You have to mount it on the board first, then press a 5 pin header attached to the PICkit3 to the pads on the board. Make sure it's the right way round.
I want to buy a few of these, when would they be shipped? I'm guessing in a month or so, right?