If engine coolant is mixing with motor oil, yes, serious damage will occur in a very short time.
Yes it will hurt and hurt severely. White smoke is almost always a sign of a blown head gasket or cracked head. Coolant is entering the combustion chamber and is also entering the oil system. You will destroy this engine if you continue to drive it in this condition.
Blue/grey smoke is usually oil. White smoke is usually coolant in the exhaust. IE: blown head gasket or something. note: if the smoke goes away after it runs for a minute it's oil runnung down the valves when it sits. Common problem, won't hurt anything.
It doesnt hurt
If both metal surfaces are really smooth and you have a good composite gasket then you may not need it. - If you have a good gasket goo available, it can't hurt. -My favorite is 'Permatex Aviation Form a Gasket' .
I believe that if a gasket is employed, then the need for gasket seal in a tube is gone, however, your gasket should be torqued to manufacturer's specifications. Yet, it doesn't hurt to have both.
Depends on how far away you are when they go off.
The top of your head might hurt when you touch it because it has been bruised by hitting it on something. It is also possible to get a sunburn on the top of your head, and that will also make it hurt.
There are a few places water can enter. A crack in the block, or head are always possible. The intake gasket, or head gasket are normally the problem. On that year engine you can BET on it being the INTAKE Gasket. It is 99% every time the intake. Don't fool with the heads there okay. Just replace the intake gasket AND be sure to get the up dated gasket, It will be a thick heavy black one. Also check the 4 corners of the intake where the gasket fits REAL GOOD for were. Then clean and replace the oil and filter and you will need to change it all again in about 10 mins of running time. You may get lucky and not have hurt the engine bearings and THAT DEPENDS on how SOON you notic the water in the oil. Good luck with it.
no.
Mobiles could distract you while driving and some smartphones give off potentially harmful radiation. They also hurt if one hits you on the head.
No, it does not
As long as you keep their head above your knees, it won't hurt them.