Hello,
The cost of living in Caracas depends on the area where you may live at. But, there are other aspects you would like to know before renting an apartament, such as, Travel distances from work (traffic is really harsh, so I recommend living in a central area). I may help you out finfing a job, I have some contacts (do you hold any degree?)
Aprox. USD 250-500 for rent
USD 200-300 for food per/month
USD 100-200 monthly for travel expenses
Hope this may have help you! 