Can I say "No, I never got this credit" under the question: Did you get the homebuyer credit in 2008, I got the credit in 2009 and I can't enter 2009

Yes, you should answer "No, I never got this credit." It is asking specifically about the first-time homebuyer credit in 2008 because that's the only year for which there could still be a repayment requirement. The repayment requirement for credits received in 2009 or later has expired.

Yes.  The homebuyer credit of 2008 and 2009 were different from one another.  The 2008 credit had to be repaid, but the 2009 did not.  If you received the 2009 credit, then you should answer that you did not receive the credit for 2008.