file for all family who are eligible
Assuming you and your spouse are both US Citizens, you should file I130 for each person who is eligible: parents, brother\'s, sisters, children. technically your minor, dependent brother/sister could ride on your parent\'s I-130, but if there is an accidental death, the I130 is automatically revoked and the "riders" lose the priority date and lose the visas. Some Embassy\'s require a separate I-130 for each person who is eligible to receive one from the petitioner, reasoning you know how many persons you can sponsor at once and give you only what you ask for. Make sure that the affidavit of support indicate all the parents and underage siblings in the total of family. i.e. your family is 4 (mom, dad, 2 children) your 4 parents and 6 minor siblings is a family of 14 to support. The US Embassy will probably total all of the people and evaluate the affidavit of support as a total, since they will immigrate as a family unit.