På söndagar brukar vi gå till marknaden med en stor påse och komma hem med två kilo frukt.

Because Swedish often puts a time expression first. When that happens, the finite verb must still stay in the second position.

So:

• Vi brukar gå till marknaden på söndagar = the neutral order
• På söndagar brukar vi gå till marknaden = same meaning, but with the time phrase emphasized first

This is a very common Swedish word-order pattern called V2 word order. If something other than the subject comes first, the verb comes before the subject.

På söndagar means on Sundays / on Sundays in general, so it describes a repeated habit.

Compare:

• på söndag = on Sunday (one specific upcoming Sunday, depending on context)
• på söndagar = on Sundays (regularly, as a habit)

The plural form is often used in Swedish for repeated time expressions:

• på måndagar = on Mondays
• på kvällarna = in the evenings
• om vintrarna = in the winters / during wintertime

Brukar means usually, tend to, or be in the habit of.

So brukar vi gå means we usually go or we tend to go.

It is a very common Swedish way to talk about habits:

• Jag brukar läsa på kvällen = I usually read in the evening
• Hon brukar cykla till jobbet = She usually bikes to work

In this sentence, brukar shows that going to the market is something the speakers do regularly.

Because brukar is followed directly by the infinitive, without att.

So:

• brukar gå
• brukar komma
• brukar läsa

This is just how the verb works in Swedish. Some verbs take att before the infinitive, and some do not. Brukar belongs to the group that does not use att.

They are in the infinitive because they depend on brukar, which is the conjugated verb in the sentence.

In brukar vi gå ... och komma hem ..., the verb brukar carries the tense, and the other verbs stay in the infinitive:

• brukar gå
• brukar komma

This is similar to English structures like usually go and usually come home, where the main idea of tense/habit is carried by usually plus the verb pattern, not by conjugating every verb separately.

Yes. In this sentence, brukar applies to both verbs:

• brukar vi gå till marknaden
• (brukar vi) komma hem med två kilo frukt

The second brukar vi is simply omitted because it would be repetitive. This is very natural in Swedish.

So the full idea is:

On Sundays, we usually go to the market with a big bag and come home with two kilos of fruit.

Till means to, and it marks movement toward a destination.

So:

• gå till marknaden = go to the market
• åka till stan = go to town
• komma till skolan = arrive at school / come to school

Swedish often uses till where English uses to for movement toward a place.

Marknaden is the definite form, meaning the market.

That suggests a specific market that both speaker and listener can identify, or simply the regular local market they usually go to.

Compare:

• gå till en marknad = go to a market (any market, non-specific)
• gå till marknaden = go to the market (a specific/known one)

Swedish uses the definite ending on the noun itself:

• en marknad = a market
• marknaden = the market

It is the same word, but the meaning is slightly different in each place.

• med en stor påse = with a big bag
  Here it means carrying / bringing
• med två kilo frukt = with two kilos of fruit
  Here it means having / bringing back

So med has a broad meaning like with, but the exact sense depends on context.

This is very common in Swedish, just as in English:

• I went with a bag
• I came home with fruit

Påse means bag, usually a sack, shopping bag, or similar soft container.

It is a common-gender noun, so it takes en:

• en påse = a bag
• påsen = the bag

In en stor påse, the adjective stor stays in its basic form because it follows an en-word in the singular indefinite:

• en stor påse
• en liten påse

If it were a ett-word, the adjective would often add -t:

• ett stort hus

Because hem is a special adverb-like word meaning home in the sense of destination or location, and Swedish very often uses it without a preposition.

So:

• komma hem = come home
• gå hem = go home
• vara hemma = be at home

Using till hemmet would sound unnatural in ordinary speech unless you mean the home in a special sense, such as an institution or residence.

Because after measurements, Swedish often uses the substance noun in a general, uncountable sense.

So:

• två kilo frukt = two kilos of fruit
• ett kilo ris = a kilo of rice
• tre liter mjölk = three liters of milk

Here frukt is treated as a mass or category, not as individual countable fruits.

If you said frukter, that would focus more on separate fruits as countable items, and it would sound less natural in this context.

Swedish often leaves out of in measurement expressions where English may include it.

So Swedish says:

• två kilo frukt
• en liter mjölk
• fem meter tyg

Literally, this is more like two kilos fruit, but idiomatically it means two kilos of fruit.

This is a very normal Swedish structure.

Yes, absolutely. That is also correct.

Compare:

• Vi brukar gå till marknaden på söndagar = more neutral starting point
• På söndagar brukar vi gå till marknaden = puts the time phrase first for emphasis or flow

Both are natural. The main difference is word order and what comes first in the sentence, not the core meaning.

Yes, very typical. The sentence uses several common Swedish habits of expression:

• a time phrase first: På söndagar
• brukar for routine: brukar vi gå
• infinitives after brukar: gå, komma
• a destination with till
• measurement without of: två kilo frukt

So this is a very natural, everyday Swedish sentence.