To Learn Read , Write Arabic , u can go to Qatar University
Guess the fee for the 1 year program is 13000/- not sure

To Learn Spoken Arabic,
U can go
Berlitz Center
Syscoms ( Above Lulu Center)
I think even these centers too have..
NEC ( National Education Center)
NIEC (National Indian Education Center)

Or else
U have to make arab friends, hanging out with them will have u speak arabic
Or..
Go to an Arabic Organisation, work or volunteer ...u will learn to speak arabic fluently