When I am charging my laptop, the bottom of the laptop and the keyboard get unbearably hot. Is there any way I can reduce...

Because the X140e has a spill-resistant keyboard, I suggest turning off the laptop and removing the battery. Turn it on again after a minute or so. If the keys still don't work, I recommend replacing the keyboard entirely as there is likely an issue associated with that keyboard.

On each corner of the LED display are four small square pads. You can remove these using any tool small enough to get beneath them and push them out, revealing all four screws.