Delete Compute Engine Instances
Login with gmail id where instances are located.
Search for compute engine
Select Instance name and click stop and then delete.
Deleting DB instances
Search for SQL
Select Instance name and click delete
Release Reserved IP Addresses
Search for external IP addresses
2) Select the IP address with Type ‘Static’ and click on ‘Release Static IP address
Click on Manage Projects https://console.cloud.google.com/project?authuser=1
Delete the project.