Pitala sam je kamo želi ići kad se vrijeme razvedri, a ona je rekla da želi samo dugu šetnju.

In the Croatian past tense, the active participle agrees with the subject in gender and number.

• pitala sam = I asked spoken by a woman
• pitao sam = I asked spoken by a man

So Pitala sam tells you the speaker is feminine singular.

No.

• In Pitala sam je, je means her. It is the unstressed object pronoun.
• In ona je rekla, je is the auxiliary verb from biti used to form the past tense.

So the same spelling appears twice, but with two different functions:

• je = her
• je = part of she said

Because sam and the pronoun je are clitics, and clitics usually go near the beginning of the clause, after the first stressed element.

Here the first stressed element is Pitala, so the clitic cluster follows it:

• Pitala sam je ...

This is very normal Croatian word order.

You can also get other correct variants if the sentence begins differently, for example:

• Ja sam je pitala ...

But forms like Sam je pitala ... are not normal.

Because kamo is used for destination, meaning where to.

Compare:

• gdje = where in the sense of location
• kamo = where to, destination
• kuda = which way, along what route

Since the sentence is about going somewhere, Croatian uses kamo:

• kamo želi ići = where she wants to go

After željeti meaning to want, Croatian often uses an infinitive if the same person both wants and does the action.

So:

• želi ići = she wants to go

This is the normal pattern:

• želim spavati = I want to sleep
• želi doći = he/she wants to come

If the subject changes, Croatian often uses a da clause instead:

• Želim da dođeš. = I want you to come.

This is very normal in Croatian.

After words like kad meaning when, Croatian often uses present tense to refer to a future situation. Here the verb is also perfective, which makes this especially natural:

• kad se vrijeme razvedri = when the weather clears up

So even though the meaning is future, the form is present.

A learner often expects something like kad će se vrijeme razvedriti, but in this kind of clause standard Croatian normally prefers kad se vrijeme razvedri.

Here se is part of the verb razvedriti se, which means to clear up.

So it is not really adding a separate meaning like itself. It belongs to the verb.

Also, se is a clitic, and in subordinate clauses it often comes right after the conjunction:

• kad se ...
• da se ...
• ako se ...

That is why you get kad se vrijeme razvedri, not usually kad vrijeme se razvedri.

In this sentence, a connects the two clauses and gives a slight contrast or shift of focus.

• ..., a ona je rekla ...

Depending on context, a can feel like:

• and
• but
• while
• whereas

Here it is basically and, but with a sense of moving from what I did to what she said.

Yes, Croatian often drops subject pronouns because the verb form already shows the person.

But pronouns are often included for:

• contrast
• emphasis
• clarity
• a change of subject

Here ona helps mark the shift from I in the first clause to she in the second:

• Pitala sam je ...
• a ona je rekla ...

So ona is not strictly necessary, but it is very natural and adds contrast.

Because Croatian does not backshift tenses as strongly as English often does.

English often changes:

• She said: I want ... into
• She said that she wanted ...

Croatian often keeps the present in indirect speech if that was the original meaning:

• rekla da želi = she said that she wants

This is completely normal. Using a past form would change the nuance and make the wanting sound more clearly past.

Because dugu šetnju is in the accusative case, which is needed here as the direct object of želi.

Dictionary form:

• duga šetnja = nominative

In the sentence:

• želi samo dugu šetnju = accusative

Both the adjective and the noun change:

• duga → dugu
• šetnja → šetnju

So the phrase means just a long walk.

Because the sentence is expressing what she wants as a thing or experience: a long walk.

So Croatian uses a noun phrase:

• želi dugu šetnju = she wants a long walk

That is different from saying she wants to perform an action, for example:

• želi ići = she wants to go

Both patterns are possible in Croatian, but they mean slightly different things:

• want a walk
• want to go

Yes, basically.

• kad = shorter, very common in everyday use
• kada = fuller form, sometimes a bit more formal or emphatic

In this sentence, kad is completely natural. You could also say kada se vrijeme razvedri, and the meaning would stay the same.