cost of living in KL (Kuala Lumpur)

Hi I am italian and I recived an offer to be relocated in Kuala Lumpur from a Malaysian company.
Could anyone answer to the following questions?
- Cost of living for a single: an average cost that take care of appartament+internet+electricity+food ecc)
- Malaysia working contracts
- Working days and not working days in Malaysian companies
- anything else I have to be aware
I will be very grateful if some one could help me,indeed I need to reply to the company at soonest.