I assume this is your PC's current configuration?
That PC is rather old and cannot be significantly upgraded. The CPU uses an FM1 socket, which was replaced by FM2 in 2012, this means there are no current CPU's that will work with your motherboard.
The 8GB of RAM is fairly simple, you need to buy DDR3-1333 and install it. Note that your motherboard will only take up to 8GB and you need to have a 64-bit operating system to use it all.
The GTX 960 can also be installed, but you will also need to upgrade your PC's power supply to a minimum of 400W.
You cannot get anything equaling the i5 4690k on your current motherboard, replacing the motherboard is effectively like replacing the PC given how large of a change this is. I suggest saving your money and either buying or building a new PC on a current platform, such as an Intel Skylake-based PC.