Sorry for the late response. The flu and a vacation don't work well together.
1. The Visual Cue line is there to allow both music and visual designers to work together. Notes may be added by hand or input via Finale and then used as reference in either the design or rehearsal stages. If it makes your score cluttered, use the Score Manager and delete the staff.
2. Titles are added just as you described. To get them to appear in the score you will need to create a text box in the score, then insert the specific item. The reason they are greyed out is because you hadn't created the text box first. Once you create the text box and then select the type of text to be inserted, the information you originally added should appear. At this point you may move the text box and/or format the text as you choose.
3. The page numbers will need to be adjusted after you have completed the score and formatted the score page layout. Some formatting has been provided but because every score and user is unique changes and adjustments may need to be done.
I hope that helps answer your questions. I'd also suggest reviewing the Finale tutorials if this is your first experience using Finale.
iMac i7, OS 10.8, 10.9, W7
VDL2.5.5, Finale 2010-14
Kontakt 4-5, various other soft synths