Question
QUESTION: What does this mean?

Disc spaces reveal loss of disc height and loss of signal at the L2-3, L3-4, L4-5 and L5-S1 disc levels.

There is displacement of the posterior longitudinal ligament.

There is minimal narrowing of the spinal can.

The neural foramina are narrowed bilaterally.

The cauda equina is without abnormality.

ANSWER: You have deteriorating discs in you lower back as a result of aging and past injuries. The discs are bulging some, causing narrowing where the nerves are exiting the spine, leading to pinching of the nerves.

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QUESTION: Is there enough damage to warrant surgery that is being suggested.

Answer
In my opinion, no. You would have to be suffering from: bowel/bladder functional loss, lower leg weakness or footdrop.  Have you tried epidural injections ? How about spinal decompression therapy? I treat this condition with COX decompression technique and refer for epidural injections if needed.