All Field Customize

Do we have a possibility to edit all fields?

Yes, you can remove/delete fields. But, only which fields does not have dynamic relation with other sections

is there a plugin for this? or do you have to delete everything manually via codes?

webdev_perfex From custom fields settings also you can do

where is it possible to delete fields in Leads section or rename fileds?

I want to delate state, City and ZIP Code. Where can i do this ?