moving from Ireland to Bahrain

Hello all. I am looking for some help please. We are moving to Bahrain soon and we wish to find out about the cost of living. The company offer 800BHR rent allowance and 189BHR Rent living allowance, a car, health insurance, 2flights home per year and schooling. The salary is approx 20000BHR per year. Can anyone tell me if this is a good deal or not. How much will a good second hand car cost say a Toyota saloon 1.6 2010. My wife is stressing about the snakes both on land and in the sea. And the poison scorpion and spiders. What precautions do we need to take to prevent being bitten by such animals. Has there ever being anyone killed by such animals. Do they come into the house? Is Bahrain save for small children? Where do Irish and English expats live in Bahrain. Any help is very much appreciated.