Take the Domain First: Trademark and Internet Domain
Domain is an important matter regarding the internet. You can trademark a domain name as well. Before selecting a name, it would be really good to check whether there is a domain for that name. This is of great importance.
A registered trademark allows you to file a lawsuit if someone has taken the internet domain of that mark. You can take the domain from them and register it as your trademark, too. There is a section in the international registration of internet domains which deals with such affairs.
Google the name first to see that it actually doesn't exist. After you make sure the name you want will belong to you and no one has ever registered it as a trademark, you should take the internet domain as well.
Purchasing a domain takes less than 30 seconds, but if you don't act fast enough, you have to spend a long time to make it your trademark. I even suggest you take the domain first and then start the process of trademark registration.
Don't lose the domain name, because it is essential to your business and trademark. Nowadays the domain name is the main topic in branding and it is considered a valuable asset.
Also remember that you cannot use a company's trademark and logo without a franchise or license agreement in place. When you sign a franchise or license agreement, you are buying a branch, and the original corporation, which has gone through the registration process, provides you with the right to use their name, logo, decoration and packing.