Where I can find all the soundtracks which are used in Naruto and Naruto Shippuden episodes?
An extensive list of the music used throughout the entire Naruto franchise is available on the Naruto Wiki. This includes a full list of:
- Various soundtracks at different points in the series
- Movie soundtracks
As a fan of the show, I would strongly encourage you to purchase the media from legal and reputable channels when possible. As an example, here is an Amazon link which points you at the first soundtrack; from there, you should be able to track down the others.