Do I need a docking station for a pc?

[Kakarmoney 0]

Previously I was using macbook pro laptop and I was advised that I should switch to a pc and I did. My question now is do I still need a docking station to connect my pc to my three monitors or just the cables will do it? also how do I get my monitors to do three different things at once? 

thank you in advance 

[Kakarmoney 0]

Dell Optiplex 9020 Small Form Business Desktop Tower PC (Intel Quad Core i7 4770, 16GB Ram, 240GB SSD, WiFi, Dual Monitor Support HDMI + VGA, DVD-RW, WiFi) Win 10 Pro

[Kakarmoney 0]

• Intel Quad Core i7-4770 @ 3.40GHz, High Performance 4th Generation Processor. 
• 16 GB DDR3L Ram / 240 GB 2.5 Inch Sata Solid State DrivE (SSD). 
• Dual Monitor Support (HDMI + VGA), Newest 4th Generation Processor, DVD-RW, Brand New KeyBoard & Mouse, Wireless WIFI, 6 x USB 2.0, 4 x USB 3.0, 1 x VGA, 2 x Display output Ports, RJ-45. 
• Windows 10 Professional (64 Bit).

[Kakarmoney 0]

Thank you Peter I appreciate it. So it these it will work? 

[Kakarmoney 0]

Apologise I meant to say WITH these it  will work? 

Thank you Peter I will get them. 

[Kakarmoney 0]

Yes unfortunately I have already bought it. 

[Kakarmoney 0]

Final question, if I want each monitor to do something different than the other then for that these cables alone are enough or do I need some sort of a switch or something too? 

[Kakarmoney 0]

Thank you so much Peter appreciate your help.