Lowrance HDS 5 Gen 1 help

I've recently bought a used HDS 5 Gen 1 from a fellow fisherman and I'm getting ready to put it on my boat. This unit came with just the original transducer and wires. I fish mostly toledo and rayburn. My question is, what else do I need to buy to have down scan, side image, the clearest sonar graphs, etc. ? I'm sure with all of the valuable information on this site that the answer to my question has already been answered on here, I just can't seem to find it.

Thanks in advance for any help!

You will need an lss box and an lss transducer for side and down.