Yes they are legal, as long as you are not spending, or getting $$ from themor using them for other things
No, other peoples were using coins long before Rome was even founded.
You can but it's not recomended. By using other peoples makeup you can get bacteria on your face or in your eyes.
by using the technology and military strategy to conquer other peoples
You can usually catch others Pokemon by using a Master Ball(does not always work)
You can save a lot of money by using internet phones. Calls to other people using internet phones can be free since data is transferred using your existing internet connections. Calls to other phones are usually cheaper as well.
One source
your mum is a cow and go research by yourself instead of using other peoples brains
using and selling alcohol is illegal in Pakistan
One computer doesn't need two connections. You could feed two computers from one connection however using a router. Using two broadband connections simultaneously will NOT give you any faster service.
we can connect by using blue tooth
people say it is rare to get a diseases by using other peoples mascara but I don't know for sure.