I am just wondering what nameservers have to be specified for a domain if a web site has no hosting, I am going to have it from home? How to point the domain to a web site?

If you are hosting a site with a domain from home your going to need to setup a DNS server or use a 3rd party company that can provide you with a DNS server.

There is another option, when you setup the web site, some domain registars have some option to create a A record that you can point to your IP on your web site too.