You can get an ITIN number for your spouse but you have to apply thru the mail with your tax return. If you kids are still in India you cannot get the child tax credit. The kids must be residents of the United States and have been in the country for more than 6 month for the filing year. You would need to submit US medical records or school records along with passports showing date of entry. See Pub 1915 and the W-7 instructions
