The colour on planes isn’t just for aesthetics, it's more aerodynamically efficient than darker colours because it saves 600-1,000 lbs of weight over darker paint, and every pound adds to operational costs;
It used to be that the "bathroom" on a plane had no smoking; however, in the event a person breaks the rule against smoking in the bathroom, it would be safer to have the cigarette butt in an ashtray as opposed to having a fire in a trash can. The world has come to accept that people will break the laws and prepare for it by making bathrooms on planes so
Those rods sticking out from the wings of a plane are not antennas; they are static discharge rods that allow planes to discharge excess electrical charges (static electricity) into the air. If a plane were to not have these static discharge rods installed it could cause interference with the radio up to and including the radio transmitting on the same frequency as your radio would cause you to get a buzzing sound and/or your radio would be fried from a lightning strike!
What about when all engines fail on a large jet? A Ram Air Turbine (RAT) is located on the bottom of most jets that allow the plane to glide even if all engines became inoperable; the RAT uses wind power to create enough power for all flight controls to safely land without using the engines.
The oxygen masks found on most large commercial jets give you approximately 15 minutes of oxygen; this isn't just because it's nice, it's because you'll be at 35,000 feet in the air and, upon loss of cabin pressure, it will take no more than 15 minutes to descend from that altitude to life-sustaining altitudes of 10,000 feet or less!
If there were to be a significant mechanical failure, jets have the ability to glide for great distances. For every 1 mile of elevation, a jet can glide anywhere from 15 - 20 miles forward. If you lose thrust in a large commercial jet, come see me for a physics lesson!