i dont know..--Answer1:Sell anything valuable, and make surewhatever you are selling is legal in whatever countryyou are from..--Answer2:It depends, a lot of people will start businesses based on their expertise or what they enjoy. I would pick a business that combines your wisdom of an area with something you love doing, and find how you can make a profit from that.If you pull that off, then you will never WORK another day....--Answer3:Start a lemonade stand, and gradually work your way up to baby sitting your little brother..--Answer4:Buy a drill press and sell services for machine shops to outsource.Eventually you may buy a belt sander.Then you can buy a lathe.Then upgrade to a CNC machine.Eventually hire a welder and a fork truck driver.Ultimately you will need other front office people to handle HR and Purchasing duties.Sales people will need to be hired and youll have to move to a larger building.Good luck.