How to know if I can use LED ceiling light bulbs?
MR means "Multi Reflector"
16 means 16/8ths of an inch wide (2")
GU5.3 means it is a bi-pin connector base where the pins are 5.33mm apart.
12V means it is 12VDC, a very important issue for you when buying replacements.

You can get equivalent LED versions using those same numbers, they should be available from any number of resources, both on-line and brick-and-mortar stores. You would not have to change anything other than the bulb itself because the LED versions will come with a built-in "driver" that will be set up to accept the power that was previously being used by the halogens. Plug and play... 

But there is more to your selection than what you posted; you need to match the "beam angle" and the "color temperature". That info should be on the side of your existing halogen bulbs too.