The reason your program does not output anything is because you call the method toString() but you never print the output of this method.
However it looks as if your linked list structure is also way off. Essentially a linked list data structure consists of a piece of data and a link to the next node in the sequence.
You however have multiple other nodes linked in your node. You should try to simplify your design because a linked list is a very simple data structure but I think you have overcomplicated it.