Q: i  have  2000  email  address  in my  pc  how  do  i  transfer  them  into  my  new mac

From About Windows Migration Assistant:

Outlook and Outlook Express contacts, and Windows Contacts from the Contact home directory are transferred to Address Book.

Migration Assistant will create a new user account and copy things into it.

If you want to put them into an existing user account, see the Manually Migrating section of Switch 101: Migrate your Windows files or system to your Mac, especialliy the Tip, "export PC contacts to vCards, and import them into your Mac Address Book"