How to HOST my website with IIS 7 so my website is brows able on internet?

You will have to make sure that your Internet Service Provider is giving you a "Static IP", which means it does not change. Most ISPs do not give this by default, but some have an extra fee you can pay if you want it. (Some ISPs even block the correct ports because they dont want users hosting webpages, in that case you would need some port forwarding in your router.) Once you have a static IP, people will be able to access your webpage by putting in the IP address. Or it would probably be easier to find if you register a domain name.