My wife and I are headed to Paris, for the first time, the week after Easter for 10 days. We're looking for some tips on (1) what to see and when, without exhausting ourselves, (2) good food, without spending a fortune, (3) good sites for photos and (4) what's right for casual, walking around, dress. I've been to Europe during military service and my wife's never been there. Any other tips would be greatly appreciated.