These sentences are ellipsis, omitting the past "can buy".
Money can buy a clock, but not time.
This omission can make sentences concise and avoid procrastination.
Similar ellipsis is common in English, but the form of ellipsis here is a bit special.
The change of poetry format is often for rhyme, for example, Shakespeare's sonnets (still in style) rhyme with inverted sentences. Moreover, this is a general text, so it is not a special usage.
Buy something for someone ... something for someone; Buy ... something for sb.
For example, can you buy me a pen when you go shopping?
This should be said in middle school English.