Will the accounts from the old site be transferred to the new site, and will we be able to login through our old credentials?
The new site will be independent of old one, so you will have to register again. There will be a way, per user request, to transfer your reputation to the new site though, so if you made several successful transactions on Bitmarket they will show up on Bitalo, so you will have a trust credit right on the start. Bitalo.com will have a rating system, so this will be very helpful to buyers and sellers.