How to fetch report name and format using SOQL in Salesforce?

Sample SOQL:
SELECT Name, Format FROM Report

here
Name - Name of the report.
Format - Format of the report(Tabular, Summary, Matrix, MultiBlock(Joined report)).

For additional queries and fields, check 

https://developer.salesforce.com/docs/atlas.en-us.api.meta/api/sforce_api_objects_report.htm