Record Producer Midi Edition Home Recording Studio Set Up, MIDI Especially!?

Home Recording Studio set up, MIDI especially!? - record producer midi edition

Hello, I have FL Studio 8 Producer Edition and a decent laptop, and I am in a MIDI keyboard to invest, but after reading them - I can still see the sequencer word "and" harvest "d interface - must I buy them, and I'm not sure what you mean it. it is possible to buy a MIDI controller keyboard (I thought, Edirol PCR-50) without any additional software and hardware? HELP! Thnakyouuuu