InDesign reads an internal bit in the font to know whether it is embeddable. If that bit is not proerly set by the font author, ID will see it as restricted and you will not be able to embed it, regardless of waht the license may or may not say.

Yes, You can create a library in InDesign, but I don't think it will do what you want. You usually use a library for a set of assets that would be used many times in multiple publications to make it easy to find them, and I believe libraries are really just pointers to the locations of the original content (that may not be true for text objects) so sending a library file to someone who doesn't also sahre access to the originals won't be much use. You can "package" and document (File > Package...) which is to old method for sending things to print, and gather the document and all links and fonts together into a single folder for transfer.

If you mean can text flow from one page to another, yes. That's called Threading and you should read the help files about working with text and then come back if you have unanswered questions. If you mean can you creat text in one location and hav it repeated elsewhere, but update when the original text is updated, in CS6 the answer is also yes, and that's called a linked story. You should aslo check the help files on that.

There is a difference of having the font the avaiable free online and in embedding.

The fonts may be licensed to install free but can have been restricted for embedding , for which you need extended license.

Refer to the below link in order to understand the font licensing and permission concept. :-

http://www.adobe.com/type/browser/info/embedding.html

http://www.high-logic.com/fontcreator/manual/index.html?fontembeddingl icensingrig.html

Personally, I'm very distrustful of dafont.com and similar free font sites as a lot of what's there seems to be uploaded by users and may be pirated. They seem to be sending you to Dieter Steffman's personal site, however, so it may be legit. The site I linked above says they are now hosting all of his fonts (and I made the presumption that they have permission to do so), but I don't see any indication of licensing terms ther or at dafont. I don't read German, so I don't know what the designer's site has to say.

Free simply means there is no charge to download, but it doesn't mean you have permission to use it commercially without paying.

I ran the web page through Bing Translator and it seems pretty clear that Mr. Steffmann does not allow commercial use of his fonts. The site has not had an update since 2004, but there is a contact link...

I'm going to send him an email and see waht happens.

When you use the Place command to import your graphics they are linked by default. This is good because it keeps your file size down and allows you to use the same graphic content in multiple files and update it in only one location if it needs editing, reducing drive space required. Linked files can be embedded, if you wish, but there are few reasons why this would be an advantage. Pasted conten. on the other hand, is not linked, and is difficult to extract for editing if required.

When you export the PDF the linked content is embedded into the PDF (along with the unrestricted fonts), and may or may not be compressed according to the settings that you use.

I'm not certain about this as I don't do screen stuff, but I believe that when you export an interactive PDF it creates a single instance of each linked object, similar to the way a symbol works in Illustrator. The PDF library in CS6 may even do that for Print PDFs, but I don't think so.

Most of the time its fine to let ID do the downsampling, and for most printing 300 ppi is a good number, but see Distance-Resolution Formula for a discussion of resolution and viewing distance. 72 ppi is pretty standard, I think, for screen, but someone who actually does a lot of that sort of work may have more to say.

For your main body copy, ID comes with quite a few very high quality fonts from the Adobe font collection (and some display fonts, too), that you may use for any purpose.