1. An amplifier that can output surround sound to those 5 wires to your speakers.

2. A cable to connect the sound card of your laptop to your amplifier. If that's possible depends on both the available outputs on your laptop and the available inputs on the amplifier. So take your laptop and the user manual with you to the shop where you buy that amplifier, so they can sell you what you need and show you it works (or: why it won't work) when they connect everything to their own demo system.