Good questions.
Simple answers.

Register an account with your basic details. Registration creates a public profile. Then sign in to add your bio, photos and preferences.

Your basic profile is visible after registration. Saving a full profile replaces it, leaving one personal profile in the directory. The homepage shows the eight newest active listings with photos.

Open My profile and listings and select Edit. Saving updates the existing listing, preserving its address and any photos you have not selected for removal.

Your profile or listing disappears from public lists and its direct link becomes unavailable. Information and photos remain saved in your account. Your registration profile will not reappear in its place.

Open My profile and listings and select Activate. Saving changes to an inactive listing does not activate it automatically.

You can have 4 JPG or PNG photos in total, up to 2 MB each. Existing photos are kept during editing. To replace one, select Remove photo beside it and choose a new file.

Yes. Choose the appropriate type on the add listing page. If you already have a profile, its editor opens. Saving changes the type of the same profile. A whole-apartment listing is separate.

Open their active profile and select the message option when available. You need to be signed in to chat. If the author added a phone number, you can view it after signing in. Received messages are in your site inbox.

The account panel has separate tabs for account details and notification preferences. Edit your full public bio and photos in My profile and listings.