I would like to creat buffers in a automate form and no matter the way (e.g. script, batches and etc) I am asking if anybody here knows how to do it or if are there scripts ready to do it.

My situation is: I have two vectors layers (a point, representing a station, and roads. From the point I need to creat circular buffers that intersect the roads and after calculate the lengths of intersected roads.

No matter the solution I would like the simple, like batch process, or built in scripts.