Yes, the color scheme and styles of any TidWiT instance can be customized in terms of the banner, the footer, the buttons, as well as the coloring of the background, the task bars, and the text.
The administrator of a TidWiT instance would have the credentials to customize the look and feel.
No specific knowhow or design tool expertise is needed. It is fairly straight–forward and quick to alter the color schemes of the Look and Feel. It is all done through Site Settings in TidWiT’s Control Panel.
Yes, partners can customize their look and feel if they own their instance.
TidWiT offers one standard look and feel, which is currently being expanded.
Yes, TidWiT’s interface is based on Responsive Design.
Yes, TidWiT provides iFrame functionality in Site Settings>Publish:
Yes, TidWiT provides an embed code to embed any piece of content on another site.
Yes, however, it would require the use of the TidWiT API as well as possibly integration and development work.