1.) Easy answer: round-trip is 85,000 Asia Miles, one-way is 50,000 Asia Miles for a "One Class Upgrade Award". But you should check the chart for more details Asia Miles Flight Awards Chart
2.) Your wife will need to add you to her Redemption List before it can be done. You might have to do this online; if I recall they charge you over the phone. Once you're on her Redemption List (5 nominees allowed), then you can call to do it.
3.) It's highly unlikely for award availability to be ready for one of the legs, and even more so for both. You'll probably need to wait-list for one or both legs and roll the dice. There is only 1 flight a day (6 seats) to/from SFO with F. The other flights don't have it.
4.) If your wife is an elite with Marco Polo then your booking will get bumped up the list.