forgot apple passcode and apple id

You are sign in here .  .  .  with your Apple ID & Password (?).

Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.

You can’t merge multiple Apple ID accounts.

See this Apple article: If you forgot your iPhone passcode

If you forgot your iPhone passcode - Apple Support

Have you forgotten your Apple ID?, Check your Apple ID via your email box, see this Apple article: If you forgot your Apple ID

If you forgot your Apple ID email address or phone number - Apple Support                  

OR see -> Having trouble signing in?

https://iforgot.apple.com/password/verify/appleid

See also -> If you can't connect or sign in to iCloud

If you can't connect or sign in to iCloud - Apple Support

Have you forgotten your password? -> See this Apple article: If you forgot your Apple ID password

If you forgot your Apple ID password - Apple Support

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

First, you need to locate your Apple ID:

If you forgot your Apple ID email address or phone number - Apple Support

You can also try going to https://iforgot.apple.com/password/verify/appleid to locate the Apple ID. Hit the look it up link then enter your first and last name, and email address.

Once the Apple ID is located, your next step is to reset the password:

If you forgot your Apple ID password - Apple Support

If you can no longer recover the Apple ID and you are seeing activation lock:

How to remove Activation Lock - Apple Support

And go to the section:

Start a support request

If you need help removing Activation Lock and have proof of purchase documentation, you can start an Activation Lock support request.

If you have no proof of purchase, Activation lock won't be removed. This is set in place to make sure that the phone is only going to be unlocked for the owner of the device