Hi

I have moved to US along with my Wife & kid(2 years) in the month of Mar 07 with L1b visa. My my is not working and she is dependent on my income. I have getting my salary in USD paid my employer here. I have some question for filing for Tax returns.
My question is
1. can my wife & son get the SSN, or I have to file for Tax identification number (TIN)
2.Can I file the request for TIN any time
3. how much time is required to get the TIN
4.can I eligible for tax refund based on dependents( wife &son)

Thanks
Kcv