Yes it is free.
It depends on the platform you choose. There are many free platforms where you can publish content, such as blogs or social media. Some platforms may offer premium features or require payment for additional services.
There are quite a few websites that will let one publish their advertisements for free. To name a few, one could try Friday Ad, Publish Free Ads and Free Ads.
People publish examples of business plans on the internet. You may also be able to get a free example from a business student.
There are various magazines and websites which publish free financial information related to specific industry. You can search for a specific industry over the internet to get free industry ratios.
everybody...
anyone!
Roughly speaking, on the Internet you can find anything that somebody is willing and able to publish there. You may not be able to find certain types of information for free if somebody wants you to pay for it - i.e., requires some sort of subscription. But quite often, you can find an acceptable alternative for free. Certain details can't be found because so far, nobody took the time to publish the information - for example, information about some obscure village, where not many people use the Internet, or are not familiar enough with methods to publish information on the Internet.
No
Building a web page for free can be done with page building software available on the internet free of charge. Wordpress is a great starting platform that can help you build and publish a site free of cost to you.
It is free.
Yes you can search the internet for free. Everything on the PS3 is free unless you are buying or renting something and at the PlayStation store they have items that are free to download from the PlayStation store
To post something you did.
If you do not publish it or do not create a default/index page, your site will not load on the internet and you will be free to work on the files without anyone seeing them.