which is the best tool for this -

Automation of signup process to a website , e.g an email signup

The tool should be able to take data from an external data file like an excel of csv file

this data file would contain data such as first name , last name , username, password etc. basic data required during an email signup . I am imagining the data file to contain of each field in a seperate column and each row to contain data for different registration / user.

At the places where manual intervention is required like image verification etc. the tool should be able to pause the script until manual bit is done then continue with the script.

What is the best way to do this - an automation tool , or any scripting language - please suggest .