I'm a noob with too many questions

I've been told i need to have a wp site with a lot of stuff. everyone is trying to sell me their template, but why can't i just get it here? I need the following (or so i've been told):
Responsive design
Mobile
SEO optimized
google font integration,
light box photo gallery
a countdown timer
star rating system
ablity to put up a stripe bar message
pricing tables and opt-in froms
iframe for facebook

Obviously, i'm confused. can i do all of the above with the themes and plug-ins on this site? Help me Obiwan. You're my only hope.

Diane