The easiest tool to generate Areas and Lengths is to use the Area Length Count report - that generates a structured Excel Report which has all the data in one file and you can use Excel to quickly sum yup the Areas and Lengths as needed as well as use Excels filtering tools and Pivot Tables if needed to group and sum data based on one of the column properties.
The link here covers the subject of 2D Takeoff to determine Areas and Lengths - at ~ minute 24 I cover the report and how to use simple Pivot Tables to group and sum the data reported.
2D Takeoff in TBC v5.0