1.) cant help you sorry, idn what those boxes are either 
2.) the grill, once you got all the bolts and screws off, simply jiggle and shuffle the long plastic piece that lays on top of the grill and take it off (upward). You may have to hold the hood latch up while doing to get the piece off) --> once you got that off, you have to reach inside of it and take 2 more screws that are holding the grill from behind (bottom right and left corners)
3.) my car had that shiit to, but i took mine off really easily.... although mine peeled off with fingernails, try some adhesive remover
2.) the grill, once you got all the bolts and screws off, simply jiggle and shuffle the long plastic piece that lays on top of the grill and take it off (upward). You may have to hold the hood latch up while doing to get the piece off) --> once you got that off, you have to reach inside of it and take 2 more screws that are holding the grill from behind (bottom right and left corners)
3.) my car had that shiit to, but i took mine off really easily.... although mine peeled off with fingernails, try some adhesive remover