If these are passive speakers with an self powered subwoofer you will need an AV receiver.
If these are passive speakers with a passive subwoofer you will need an AV receiver plus sub amp or self powered subwoofer.
If these are all powered speakers with a 5.1 analog input you will need a digital to 5.1 analog converter.
I don't see any info on that brand or model, need some details about the system, link to a manual or product page, and also the TV you are using, what outputs is has.
If these are passive speakers with an self powered subwoofer you will need an AV receiver.
If these are passive speakers with a passive subwoofer you will need an AV receiver plus sub amp or self powered subwoofer.
If these are all powered speakers with a 5.1 analog input you will need a digital to 5.1 analog converter.