don't worry about SRS sensor, you won't be getting near that with tools.
to remove bumper you first need to remove the grille (3 bolts on top on my car and a few clips holding it to bumper at bottom) then lights.
to remove headlights you need to remove the corner lamps first, there is just one tiny screw on top, it bolts it to head lamp, once removed (wear a rubber glove, it helps) pull with your palm on the corner lamp towards front of car and it will get unclipped from fender, no need to pry on anything.
once there the bolts will be exposed.
bumper is also held by a few one time use plastic clips from bottom and top (below headlamps).
there is also 2 hidden nuts holding bumper to fenders, you will need to unscrew and peel off the plastic fender liners to get to them.
at least that's how it is on my solaras, camry might be a tad different... but it gives you the idea. nothing hard about it, just a little time consuming
don't forget to unplug fog lights (if any) before dropping the bumper