How do you register a web address of your own name e.g. www.marymurphy.ie or .com? If you have to pay someone is it a once-off fee or an annual thing? Does it matter if you don't use it for a few years? Thanks.
you will need to register the business name with CRO first if it's a .ie domain and then go to a domain registration company and they will do it for you, you should get a list from www.iedr.ie for .ie domains.
You actually buy them from a registered reseller - I use Blacknight.
(2) .com domains are easier and cheaper. Typically €5-10 per annum.
They operate on a first-come, first-served basis. I use Godaddy.com for mine.
In both cases there is no particular requriement to use the domain for anything.
When you buy a domain, depending on the registrar, you may get an email facility and some basic hosting space. However, without paying more, you generally get very little actually included with the domain.