Website
Nowadays, your website is the shop window to your company – whatever sort of business you have. A professional website does make all the difference but it doesn’t have to cost your whole start up business to get you started and with some digital skills you could look at using a platform such as wordpress to build your own website and there's lots of small web agencies in the local area that specialise in helping small businesses get started online.
Whether your business is selling online or offline, you’ll also want people to be able to find you online so it's worth spending the time looking into Search Engine Optimisation and Google Adwords.
Finally, don't forget to get yourself a Google Analytics account and link up your site so that you can find out more about who is visiting your site.