have a look through the forums... theres plenty of threads about PA advice. once youve got an idea of what you want (or budget), post a thread on here and people will advise. my only tip is to avoid maplins and other "no name" brands.
as for advertising, as long as your site is good, google adwords with a reasonable budget per month should net you plenty of work.
i've only had a *very* quick scan of your site... i noticed a few grammatical errors, and it looks to me like youre using generic stock photos. get yourself a bunch of GOOD quality photos... if you arent a photographer, slip a mate who is some beers/£20 and get them to do you some. or if youre at a wedding, have a friendly chat with the photographer there! you want clean and tidy rig photos, as well as a bunch of pics of people having a good time... mobile phone photos just dont cut it.
as long as you are prepared to take onboard comments from people here, youll have a classy, tidy setup, great website and be getting infinitely better gigs compared to when you started