@GURUDEV H Y​ please follow the below steps:

Move Notebooks - You can use the move option to move the notebooks from one user to another.

for changing the jobs, you can transfer the ownership.

https://docs.databricks.com/security/access-control/jobs-acl.html#configure-job-permissions

Or you can refer the Permissions API to change the permissions for the notebooks and jobs.

https://docs.databricks.com/dev-tools/api/latest/permissions.html

For data -- Do you mean the database? If so, you can change the database owner using SQL commands.