As I said before, without more context, it's hard to determine exactly who Dil Nawaz is. He could be anyone from a local hero to an ordinary person with an extraordinary story.
The story of 'dil se dil tak' likely revolves around relationships. It could involve the meeting, falling in love, and facing challenges in the relationship of the main characters. Maybe there are elements of family interference, personal insecurities, or misunderstandings that the characters have to overcome. Without having watched it in detail, it's hard to say exactly, but most such shows follow a pattern of exploring the various aspects of love and relationships.
The title 'dil akhir dil hai' gives an impression that it might revolve around the concept of the heart. It could be a story that delves deep into human emotions. It might be about a character who has been through various experiences that have shaped their heart. They could have faced love, loss, betrayal, and through all these, the story could be about how their heart remains a heart at the core, with all its vulnerabilities and strengths. However, without proper knowledge of the actual story, it's difficult to say for sure.
Mr Pickles is a really strange and somewhat disturbing character. Well, his origin story is quite dark. He was created in a small, rather spooky town. Supposedly, he was once an ordinary pickled cucumber that was experimented on by a mad scientist who lived on the outskirts of the town. The scientist was trying to create a sentient food item for some really odd reasons, and Mr Pickles was the result. He then started to develop a very warped sense of the world around him and his actions are often unpredictable and quite violent.
The 'lou pickles war story' is quite mysterious as I've never heard of it before. It might be a story passed down in a certain community or family. It could involve Lou who had something to do with pickles during a time of war. For example, perhaps Lou used pickles in an unexpected way during the war, like using pickle barrels for shelter or pickles to trade for supplies. But again, this is all speculation without further details.
I doubt they are very popular. I mean, it's such an odd combination of things - spud pickles and ghost radar. Most people probably haven't even heard of this concept, let alone it being popular.