That lock looks like any generic cabinet lock, pop it out and take it to a locksmith. They'll either have a key code for it a replacement lock that will interchange with the one you have. As for removing the stickers a heat and plastic scrapers followed by some Goof Off, 3M Adhesive Remover or WD-40 will get the adhesive off. Most likely when you get the stickers off you'll have darker red areas that match the outline of the stickers.
For the make of box, maybe Remline, Waterloo, Beech or MBC.