The BIOS screen of the PC shows that the hard drive has a hardware error ("SMART capable and status BAD").
The drug described as Succinylcholine does not slow the heart rate, it stops breathing and there is no antidote, it is used by medics for intubation.
The PC inside the safe is an early 2000s model (complete with separate graphics card, separate sound card, floppy disk drive and two CD-ROM drives). Even if that PC was still working, it is highly unlikely the CIA would use it to store any kind of sensitive information.
The coordinates given to Weller are in the center of a city. The following scene shows that Jane is not living in a building, but in a tent.