I feel like this function will cause more problems than it's supposed to solve. Here is why:

A function should do a specific task, that is self descriptive by the function name. Having a function that does a lot of different things depending on it's parameters is not easy to use and read.

Unfortunately `toggleClick` does not do what it says, and it uses up brain matter every time you have to use it.

If I somehow ended up having to work with this code i'd have to run the `if` statements in my head before writing them as parameters to the function.

> If the user clicks the first element, I should toggle the third child of that element,<br> 
> but only if this variable is TRUE, otherwise the parent itself should toggle instead

If I had to use something like this, it is such a specific use case that I'd propably write the code I just thought about, instead of trying to figure out what this function does.

What I'd do:

If I can edit the markup, or the interacting elements are not decided dynamically, I'd set IDs to the elements I want to interact and do a simple

 $('#myelement').on('click', function(){
 $('#target_element').toggle();
 });

It might be 3 lines long, but you know what it does the moment you read it. If you want to mimic the use of your `toggleClick` you can try this instead:

 // When I click the 2nd child of #my_element...
 $('#my_element :eq(0)').on('click', function(){
 // Toggle the fifth child of the #target_element
 $('#target_element :eq(4)').toggle();
 });