Mahalaga ang pangunang lunas; dalhin ang kapote at bota.

Filipino often uses predicate-first word order. So Mahalaga ang pangunang lunas is a very natural way to say First aid is important.

You could also say Ang pangunang lunas ay mahalaga. That version is also correct, but it sounds a bit more formal or marked. The version in your sentence is shorter and very common.

Ang is a topic marker, not simply the English word the.

In Mahalaga ang pangunang lunas, it marks pangunang lunas as the thing being described as important.

In dalhin ang kapote at bota, it marks kapote at bota as the thing affected by the verb dalhin. So the job of ang depends on the verb pattern, not just on whether something is definite in English.

Pangunang lunas is the standard Filipino term for first aid.

• lunas = remedy, cure, treatment
• panguna / pangunang = first, initial

So the phrase literally means something like initial treatment or first remedy, which matches the idea of first aid.

The -ng at the end of pangunang is a linker. Filipino often uses a linker to connect a modifier and the word it describes.

So:

• pangunang
  • lunas
• literally: first
  • treatment

This linker is very common in Filipino grammar.

Dalhin is an imperative form meaning bring. It comes from the root dala, which is related to carrying or bringing something.

More specifically, dalhin is an object-focus form. That means the sentence is grammatically built around the thing being brought: ang kapote at bota.

Both are possible, but they use different verb patterns.

• Dalhin ang kapote at bota
  Object-focus; it highlights the items being brought.
• Magdala ka ng kapote at bota
  Actor-focus; it highlights the action of the person bringing them.

In everyday English, both can translate as Bring a raincoat and boots, but the Filipino grammar is different.

In Filipino commands, the subject you is often left out because it is understood.

So Dalhin ang kapote at bota already means Bring the raincoat and boots or Bring a raincoat and boots.

If you want to make the subject explicit, you could say:

• Dalhin mo ang kapote at bota. = You bring the raincoat and boots.
• Dalhin ninyo ang kapote at bota. = plural/formal you

Filipino nouns do not always have to be marked for plural. Number is often understood from context.

So bota here can naturally be understood as boots in the general sense, especially as a piece of gear. If you really wanted to emphasize plural boots or multiple pairs, you could use mga bota, but it is not necessary here.

Yes. Both are common Filipino words borrowed from Spanish.

• kapote = raincoat
• bota = boot

This is very normal in Filipino. Many everyday words come from Spanish, but they function as ordinary Filipino vocabulary now.

The semicolon links two closely related ideas:

• Mahalaga ang pangunang lunas = a general statement
• dalhin ang kapote at bota = a practical instruction

It shows that the two parts belong together. You could also write them as two separate sentences, but the semicolon neatly connects them.