I was able to find a service manual online which lists the inputs for that TV as the following:
- RF connector (cable/antenna)
- Composite (yellow video, red/white audio)
- S-Video
- Component (red/green/blue video, red/white audio)
- D-Sub (analog PC connector)
- DVI (digital PC connector)
Your Playstation would need to be plugged into either the component or composite connectors depending on which Playstation you have. The Playstation 1, Playstation 2, and Playstation 3 all can use the same composite cable, and the Playstation 2 and Playstation 3 can both use the same component cable. The Playstation 4 only uses HDMI, which your TV doesn't support, so you would need to use an HDMI to component converter (under $20 on Amazon).
As for the Roku, same rules apply, but it again depends on your Roku model.