How can I reset my password from the (padlock) screen ? Can’t remember login p/w and recovery key isn’t helping either…

If you have a firmware password enabled and you don't know it, then you will need to take the laptop to Apple or an Apple Authorized Service Provider so they can remove the firmware lock, but you will need to provide the proper proof of purchase and proper ID. See this Apple article for details about a firmware lock:

Set a firmware password on your Mac - Apple Support