How to Mass Delete Salesforce Records | How to delete all records from Salesforce

Hello, When I attempt to mass delete reports I get the following error message "You have reached the maximum number (250) of deletable Reports at one time. If you would like to delete more Reports, first delete the ones below and then perform another mass delete." Please help. I cannot get past this error

Hey can i add a mass delete functionality on lead object list views and choose multiple records in the UI to delete from "Mass Delete" action or button ..
?
Please help