Theme Customization

Working on this Product theme. Having some complications.

1. For one, my header or title text on the first (and only) slider is not showing up big like the demo. I don't know how to make it bigger. I tried putting in header tags <h2> but no go. Don't know where to fix this. Where would I do this?

2. Need to get rid of the WPMU DEV - The WordPress Experts footer. Where do I do this?

3. Need to get rid of the top left search bar as well as the "Enter a site description in options" bar on top. Leaving it blank still puts in that text by default. Where do I do this?

Thanks.