Leveling up and Unlockables

Im working on a networked FPS game, and I need to figure out how to make a script that Displays your player's Level and Current Experience. And also to save the stats using playerPrefs, so if the player closes the game and turns it back on his stats will be there saved. And also a button in the main menu saying "Player Profile", well thats easy but I want that button show the Level and Experience when I press on it.

I hope I didnt overloaded you with work, Thanks in advance