Hoeveel tyd het ons?

Because hoeveel covers both how much and how many in Afrikaans.

So:

• hoeveel tyd = how much time
• hoeveel boeke = how many books

Afrikaans does not usually make that same distinction with two different question phrases the way English does.

Afrikaans uses a verb-second pattern in main clauses.

That means:

• the first position can be taken by a question word or question phrase
• the finite verb then comes next
• the subject follows after that

So the structure is:

• Hoeveel tyd = question phrase
• het = finite verb
• ons = subject

That gives Hoeveel tyd het ons?

Compare:

• Statement: Ons het tyd.
• Question: Hoeveel tyd het ons?

Het is the present-tense form of the verb hê, meaning to have.

In Afrikaans, hê is very simple in the present tense:

• ek het
• jy het
• hy/sy/dit het
• ons het
• julle het
• hulle het

So the form het stays the same for all persons.

Afrikaans does not use do-support the way English does.

English says:

• How much time do we have?

Afrikaans simply changes the word order:

• Hoeveel tyd het ons?

So there is no separate word corresponding to English do here.

Because tyd is being used as a general, uncountable noun: time in general.

Afrikaans often leaves out the article with abstract or uncountable nouns when speaking generally.

So:

• Hoeveel tyd het ons? = asking about the amount of time available

If you were talking about a specific time or specific period already known in context, you might see die tyd, but not in this sentence.

Tyd means time in a general sense.

Uur means hour, and ure means hours.

So:

• Hoeveel tyd het ons? = asking about available time in general
• Hoeveel ure het ons? = asking specifically how many hours

If you want to ask for the clock time, Afrikaans usually uses:

• Hoe laat is dit? = What time is it?

Usually, hoeveel tyd is the more natural way to ask about the amount of time available.

Hoe lank often means for how long or how long in duration.

So the two ideas are related, but not identical:

• Hoeveel tyd het ons? = How much time do we have?
• Hoe lank gaan dit neem? = How long will it take?

In many real situations, Afrikaans speakers might also say things like Hoe lank nog?, but the sentence you were given is the standard way to ask about available time.

Yes. A very common version is:

Hoeveel tyd het ons nog?

Here nog means something like still or left.

So this version asks:

• How much time do we still have?
• How much time do we have left?

That is often the most natural form in situations where time is running out.

Ons can mean both we and us, depending on its role in the sentence.

In Hoeveel tyd het ons?, it is the subject, so it means we.

Examples:

• Ons het tyd. = We have time.
• Hy sien ons. = He sees us.

So here, because ons is doing the having, it means we.