The answer is pretty simple, you will get more exposure for your business for the least amount of money. Search engines file your page content withing one domain name. If you have multiple domains, this multiplies the chance of having a surfer click on the link to your website.
No. You can simply redirect natural type-in traffic from the new domain to your existing website. It's a quick and simple process just change the nameservers to point your existing website. We will gladly do this for you just give us a call.
Quite often people only remember the name of the company but not the name of the acutal website. Having multiple domains centered around your name and business increases the chances of the traffic going to you and not the competition.
No. All you have to do is change the nameservers so that they point to your existing website or give us a call and we will do it for you.
This does not really prevent other people from using unregistered versions of your trademark for other legal or illegal reasons. A good example is Nissan.com, a trademark just for your branch in the industry and quite often just for your region of the world. Defensive registering will help protect your brand and business.