In order to customize your emails you can navigate to WooCommerce->settings->emails and click on manage and copy it to your theme folder. You can customize the email from there.
Free version emails:
- RFQ-ToolKit New Request for Quote (Customer)
- RFQ-ToolKit New RFQ Admin (Admin)
- RFQ-ToolKit Quote Sent ( Customer )
- RFQ-ToolKit Admin note ( Admin)
- RFQ-Toolkit Product Marketing (Customer)