CiviCRM Community Forums (archive)

Before you go too far with WordPress + Civi, consider switching to Drupal if this is a big/important project. I've found the WP integration to be very buggy so far and missing some features. Without knowing much about Drupal, I think I would have saved time if I'd gone that direction (based on the assumption that it would have taken me less time to learn Drupal than it has taken me to solve problems related to WP).

To answer your questions:

1. Yes, but if you create a Civi profile for a signup form and include the "require WP account creation" option, that part will be handled going forward.

2. You might have to do it by SQL directly. See my response to your other post and the related thread. Alternatively, you could delete all your contacts in Civi (do a bulk permanent delete), use the Add Multiple Users WP plugin to import WP users in bulk, then do the sync.

3. Not sure if it's possible with the sync. Again, you might be able to pull it off using SQL directly if you can't using the Civi bulk options.