Cant download fro G.Play - Processes crashes (Motorola DROID 3)

[Furchimdq]

I bought a Moto Droid 3, the guy told me that is blocked (was from Verizon, and im from Argentina) to call and send sms/mms, but i could use Android apps with WiFi, the camera, etc...
I didnt want to call or send sms, i wanted to use it as a WiFi Tablet and the camera 1080p. So i thought great! So i bought it.
But i realized that the phone was rooted (i saw superuser app instaled).
I had some errors so i tryied to fix them clearing cache and dalvik cache in the safe mode but, i have THE SAME PROBLEMS in safe mode!

The problems are "The aplication XXXX (Process com.motorola.XXXX) has stopped unexpectedly. force close" with the following apps:
Calendar Storage (com.android.calendar)
com.motorola.service.main
Msg. SMS/MMS (com.motorola.conversations)
IM (com.motorola.im)
Email (com.motorola.email)
Contacts storage (com.motorola.contacts)
Twitter and some more...

Error in Google Apps when i download/update an aplication:
'"XXXX" could not be downloaded due to an error. (491).'
Also i cant download pictures from facebook for example.

Aplications running in Safe mode (also getting all the errors):
Data Manager Service
Settings
Voice Commands
Google Services
Sync Service
Files
Maps
Text Messaging
Swype

How can i fix the errors, help T_T