to retrieve your numbers you would need to follow these key strokes...
center, toggle down (1 time), center, toggle up (2 times), center, toggle down (5 times), center, toggle down (5 times), center (3 times)
then wait for quite some time...it takes a while to copy all of the contacts...I would say anywhere from 5 to 10 mins...
this should work to save your contacts.
To save your pictures (and any other data you might want to retrieve) you could buy Sony's data cable
for the z525a. I haven't tried this but it should work since that is what the cable is for.
Its called a DCU-60 USB data cable, and is listed as being compatible with the z525a.