I have the bundled 705 only because I bought mine at cost. to answer your questions:
1. Yes
2. No
3. No, its extremely difficult to get lost where I live no matter how far I ride. Maps are great if you live in super congested cities, otherwise you wont need it.
4. Have maps, dont use em.
5. N/A
6.1 No, I researched this for a friend who doesnt have maps and tried to copy my card, cant seem to make it work. Garmin has their stuff protected.
6.2 If you must have maps, get the micro SD.
I originally thought I would use the maps, but in the end, I just download my ride and look at the maps thru Garmin Connect or my Garmin Training Center.