1. Tough one. Old Canal Zone words typically maintain their anglophone pronounciations. It's Albruke in the first case. The others may revert to spanish.
2. Only Metro Linea 1 is operational, the one with the station right outside the El Panama.
4. Anything at the major malls.
5. To be sure, leave the sneakers in the hotel. Jeans should be OK.
7. It shouldn't rain, but if it does, it's typically it's a cooling effect at first, followed by a miserable increase in humidity.