Internet Website Research

I am looking to set up a new website supplying embarrassing/personal pharmaceutical products, i.e. Viagra, Cystitis treatment, Thrush treatment, etc. in the UK.

I am wanting to find out what our competitors are offering, how the sites are constructed, how they are SEO'd, how people are being attracted to the site, if they are using Google Adwords and if so what words are being used.

I will require a report which will include all of above and any other relevant information that will assist me in creating a successful ecommerce site.

Many thanks
Chris