You heard wrong I’m afraid.
SWIG doesn’t convert anything, SWIG takes a set of headers and other infos, and helps automating the build of a set of bindings between the libraries/code interfaces sourced from those headers, and a higher level language that it might support.
It’s not as straightforward as feeding it a bunch of things randomly and getting flawless bindings out of it, and it will require some C++ experience to get anything barely usable out, not to mention the bindings will only be as good as the headers and the user side work, and in the best of cases (due to the nature of the conversion) clunky as hell.
Also i heard i need mono-develop but as far as i can see its just a editor. Am I right?
You heard wrong again I’m afraid 
Mono is a cross-platform effort to enable .NET on platforms other than windows.
Mono-develop is an IDE facilitating mono specific development.
Unless you plan to work cross platform, you don’t need either.
I’ve visual studio and i prefer to use that for programming.
for C# it’s arguably the best thing you can use.
So my question is does anyone already use those tool in combination to create a cinema 4d plugin?
Not a C4D expert, but I doubt anybody did, and if you developed solid bindings for the C++ API to interface with something else, you would probably be better off selling those in first place 
I actually stucked currently at the installation lol.
anyone can help install the tools the right way?
If you got stuck at the installation of something, then laughed it off out loud, and you start off by not understanding what SWIG does or what Mono is, chances are you’d be biting more than you can chew.
I’d suggest to pick up C++ if you intend to develop for any 3D Application out there.
If you’re really adamant in wanting to write in C# though, and this is maybe some school project that requires you to, then AD|Softimage (used to be Softimage|XSI) is the only major app out there, that I know of at least, that natively supports C# between the API supported languages.
anyways thanks!
You’re welcome.
Good luck 