You might want to check out their web site if they have one.
Also something I have found to be helpful is to meet with the pastor, armed with specific questions.
Or perhaps if you prefer you can do this via e-mail.

Seeing you are just looking for a biblical Church, you can word your questions in a manner that doesn't necessarily show what you believe on the topic. I have used this method with some success, mainly because the pastor doesn't give the answer he believes you want to hear.