Relocation to Qatar - Accommodation & few other Queries

Hi , 
Recently my DH has been offered a Job in Doha in a reputed company. They are providing 15,000/- QAR for housing.
I have lived in Kuwait for 15 yrs. and I am a bit nervous to relocate . But, it's a good opportunity for husband dear so want to support him wholeheartedly. Although , a bit worried as heard the cost of living is very high.
The initial biggest & worrisome glitch of schooling is kind of sorted . My son will join year 8 with Sherborne & my daughter will start Year 5 with Doha College , West Bay campus. I am happy  & Thank God immensely that they got the places in schools ( as it's a huge nightmare here) but unfortunately in two different schools hence I have to be on road most of the time. 
1) Highly appreciate if anyone could guide me for which residential areas to look in, for housing ( preferably compounds) which would be a good mid point between the two schools In order to minimize the driving time.
2) Is Sherborne a good school for secondary education ?

3) My children have passed Grade 2 ABRSM for Saxophone & Piano. They would definitely like to continue with their talent. Would like to know if there are well reputed teachers who would take classes?

4) Finally, what are good malls & parks in Doha? Do they have any Bazaars here?

Looking ffwd to get inputs from the lovely people here. Thank you.