Help with website development

Hi all! I need your help. I want to move my business to the Internet. The functionality of the site is almost ready. But I have a question about web design. As important that the site has a unique design or can I use a template version? This affects only the appearance or site promotion as well?
And please tell me to create a unique design can hire individual freelancers or better to contact a creative firm Bold Web Agency to attract a team of experienced designers.

Depends on how much you want to spend to get it going. Will it be an ecommerce or just a static website?

It will be an online shop

Then you will need someone who can set up and ecommerce site. That will cost some. You can do it with templates at some ISPs. If yours can, there should be instructional tutorials to help you figure it out.