To avoid having to license elements of your presentation, which is nearly always more trouble than it's worth, you would be more likely to select public domain or creative commons-licensed materials. For example, you might want an image of a globe to illustrate some point. If NASA imagery has something suitable, you'd want to use that rather than a protected image.
An extemporaneous presentation is a presentation that you planned and rehearsed for. You might refer to notes or an outline, but you create the sentences as you speak.
The phrase "copyright obtained" doesn't give any indication of who copyright might be assigned to.
Anyone who creates an original work is using copyright to protect it.
Generally, it can't. Copyright infringement might be said to hurt the rightsholder, but copyright itself is designed to avoid that.
This site might help: http://webdesign.about.com/od/copyright/a/aa081700a.htm
It will make you have to restart and clean the wipple. it is true.
There is no simple answer to that question. Every business and every presentation is different. So sometimes you would want a very formal presentation and sometimes it would not need to be so formal. You may use a template that is specifically for a particular company, so it might have a company name and logo on it for example. They may use it for all of their presentations. A presentation could have different sections, with each section using different designs. The audience can also be an influence on how a presentation is designed. So each presentation you make needs planning and careful thought and can be different.
Any method that gets the sale (provided you are honest or ethical). This means it might be a Powerpoint presentation, a demonstration, a standing or sitting presentation. Whatever works, do it.
You probably wouldn't want to copyright a product; you might want to trademark it, or (if it's revolutionary) apply for a patent.
it might freeze on you and it might not play the audio
all of the above
You can use a presentation in case of a slide show. For a document you might use word processing.