Dev-C++

Yes ,you can learn c++ directly without any knowledge of c . C++ is object oriented language and it is simple to learn as compare to c.

The following tutorials will teach you the most important concepts.

Yes, you can learn it all by yourself but it depends hugely on what type of coder you want to be . If you want to learn just for beginner-level syntax, some for loop, arrays, and strings are enough. For intermediate level, you must know Data Structures and Algorithms in c++.

The C++ Tutorial LearnCpp.com is a free website devoted to teaching you how to program in C++.