1. The company offering me the job has not yet disclosed the salary. Obviously they would be asking me for my expectations. looking at above lifestyle, what should be my expected salary?
Bahrain does not follow a salary standard, based on your 80000 INR requirement plus to meet the requirements in Bahrain you will need about 1200BHD approx.
420BHD approx 80000 inr, plus 200-300BHD for an decent 1BHK apartment and remaining misc.
(keep in mind todays BHD value with INR is approx 192, the value may go up or come DOWN)
2. As my company is in Al Hidd, I would like to explore same area for residence. Is it a good place to live? What is average rent in this area in both cases like if I rent a small apartment for my own (furnished) or if I share?
Rents will vary, i would recommend you come down first have a word with your colleagues, go around places and then decide for yourself
3. Will it be very difficult for me to find pure vegetarian food? What would be my monthly expense on food seeing my strict requirement?
veg food is not an issue, you will find lot of veg restaurants. Monthly expenses for a single person should be approx 60BHD approx
4. In case I find residence far away from company, I am planning to buy a motorcycle. How much a used motorcycle would cost?
You will need to get a license first, remember weather is a constraint not many can ride motorcycles throughout the year and its risky to ride one as other vehicles move a lot faster.
5. How often will I be able to travel back to India? I have learnt that employer provide once in a year round trip to my homeland, but if I wish to travel on my own expenses, are there any restrictions from the Immigration department?
From immigration point of view once a multi entry visa is stamped on your passport there are no restrictions.
6. I have some friends working in KSA and UAE (Dubai). Can I just go to meet them or I need to take separate Visa for the same?
KSA visa requirements are strict, UAE is easy (you can apply for a e-visa, since you will have a Bahrain resident permit)
7. I have India Driving License and as per the forum discussion I got to know that the same is invalid in Bahrain. Will it be a good idea to convert my license to International Driving License? Will it hasten up the process of getting a local one?
You heard that wrong, you can only drive in Bahrain with an international driving license if your only on a VISIT visa, for all other status you will need to apply for a Bahrain driving license
8. Earlier, I have traveled to two countries: Austria and Sri Lanka. Will it create a problem in getting Bahrain Visa just like Israel stamp on your passport does?
No.
Kindly also go through the below mentioned links
/forum/viewtopic.php?id=745829 : cost of living 2018
 : Definitive Guide to Bahrain for New °µÍø½ûÇøs
: cost of living
: cost of living area wise
T&R