1.Yes, but most likely they will be signing up for a RP or asking questions before signing up.
3. I believe so, but only accepted Character sheets are meant to post there,
5.DON'T know about this one, but I don't think you can without searching manually.
6.[url= http://example.com] Click Me [/url] Enter your RP's IC/OOC page URL in after the = and before the ] If you're wondering how, check the QQ sheet below.