Το ερωτηματολόγιο είναι μικρό και δεν θέλει πολύ χρόνο.

Το means the. It is the definite article for a neuter singular noun in the nominative case.

Here it goes with ερωτηματολόγιο (questionnaire), which is a neuter singular noun:

• το ερωτηματολόγιο = the questionnaire

Greek uses the definite article very often, just like English does in sentences like The questionnaire is small.

Greek nouns belong to a grammatical gender: masculine, feminine, or neuter.
Ερωτηματολόγιο happens to be a neuter noun.

A useful clue is its ending: many Greek neuter nouns end in -ο or -ιο:

• βιβλίο = book
• μουσείο = museum
• ερωτηματολόγιο = questionnaire

Because it is neuter, other words connected to it also have neuter forms, such as:

• το
• μικρό

Because adjectives in Greek must agree with the noun they describe in gender, number, and case.

Since ερωτηματολόγιο is:

• neuter
• singular
• nominative

the adjective must also be neuter singular nominative:

• μικρός = masculine
• μικρή = feminine
• μικρό = neuter

So:

• Το ερωτηματολόγιο είναι μικρό. = The questionnaire is small.

In this sentence, μικρό means something like small, short, or not long.

With a questionnaire, English might naturally say:

• The questionnaire is short
• The questionnaire is small
• The questionnaire isn’t long

Greek μικρό can cover that idea naturally in context.

Here είναι means is, from the verb είμαι (to be).

In this sentence, Greek normally includes it:

• Το ερωτηματολόγιο είναι μικρό = The questionnaire is small

Greek can sometimes omit forms of to be in very informal styles, headlines, notes, or special expressions, but in a normal full sentence like this, είναι is the standard form.

Δεν is the basic word for not before verbs.

So:

• θέλει = it wants / it requires / it takes
• δεν θέλει = it does not want / it does not require / it does not take

In this sentence:

• δεν θέλει πολύ χρόνο = it doesn’t take much time

So δεν simply makes the verb negative.

This is a very common Greek usage.

The verb θέλω literally means to want, but in many everyday expressions θέλει means:

• it needs
• it requires
• it takes

So:

• Θέλει χρόνο. = It takes time.
• Θέλει δουλειά. = It needs work.
• Δεν θέλει πολύ χρόνο. = It doesn’t take much time.

So even though the core meaning of θέλω is want, learners should get used to this broader, very natural use.

Because χρόνο is masculine singular accusative, and the form of πολύς (much/many) has to agree with it.

Here are some forms:

• πολύς χρόνος = much time (nominative)
• πολύ χρόνο = much time (accusative)

So in this sentence:

• δεν θέλει πολύ χρόνο

the word πολύ matches χρόνο.

This can be confusing because πολύ is also the form of the adverb meaning a lot / very. But here it is functioning with the noun χρόνο, so it is best understood as the agreeing form meaning much.

Χρόνο is the accusative singular of χρόνος (time).

That is because it is the direct object of θέλει:

• θέλει χρόνο = it takes time

Compare:

• ο χρόνος = the time (nominative)
• τον χρόνο / χρόνο = the time (accusative)

So the sentence uses χρόνο because the verb θέλει takes an object.

Here και simply means and.

It joins the two parts of the sentence:

• Το ερωτηματολόγιο είναι μικρό
• και δεν θέλει πολύ χρόνο

So the full idea is:

• The questionnaire is short/small and doesn’t take much time.

Nothing unusual is happening with και here.

Yes. Greek word order is often more flexible than English word order, because noun endings show grammatical relationships.

The neutral, straightforward order here is:

• Το ερωτηματολόγιο είναι μικρό και δεν θέλει πολύ χρόνο.

But other orders are possible for emphasis, for example:

• Μικρό είναι το ερωτηματολόγιο...
• Δεν θέλει πολύ χρόνο το ερωτηματολόγιο...

These sound more marked or context-dependent. For a learner, the original sentence is the most natural basic version to remember.

Yes, depending on context, that can be a very natural English translation.

Literally:

• δεν θέλει πολύ χρόνο = it doesn’t need much time

Natural English equivalents include:

• it doesn’t take much time
• it won’t take long
• it won’t take much time

So if the meaning has already been given to the learner, it is useful to know that Greek is expressing the idea through θέλει = needs/requires/takes.