Jeg lager te med en tepose og varmer kylling til middag.

In Norwegian, lage is the normal verb for make / prepare when talking about food and drinks.

So:

• lage te = make tea
• lage middag = make dinner
• lage kaffe = make coffee

The verb gjøre usually means do, not make in this kind of context.

Norwegian often leaves out the article with uncountable or general food/drink nouns, just like English often does.

So:

• Jeg lager te = I’m making tea
• Jeg drikker kaffe = I drink coffee
• Vi spiser ris = We eat rice

You would use an article if you meant a specific tea in some contexts, but here te just means tea in general.

Tepose is a countable noun, so it takes an article when you mean a teabag.

• en tepose = a teabag
• teposen = the teabag
• to teposer = two teabags

The article en shows that tepose is a common-gender noun.

Yes. Norwegian very often combines nouns into one word.

So:

• te + pose = tepose = teabag
• middag + bord = middagsbord = dinner table
• kaffe + kopp = kaffekopp = coffee cup

This is very common, and English speakers often need to get used to writing these as one word in Norwegian.

Here med means with.

• Jeg lager te med en tepose = I make tea with a teabag

It tells you the method or tool used. In other contexts, med can also mean with in the sense of together with someone:

• Jeg går med vennene mine = I’m going with my friends

Because the subject jeg has already been stated, Norwegian can leave it out in the second part when the same subject continues.

So:

• Jeg lager te og varmer kylling
  means
• I make tea and heat chicken

This is like English saying I make tea and heat chicken instead of repeating I: I make tea and I heat chicken.

Both languages often avoid repeating the subject when it stays the same.

They are both in the present tense.

• lager = make / am making
• varmer = heat / am heating

Norwegian present tense is often formed by adding -r to the infinitive:

• lage → lager
• varme → varmer

The Norwegian present tense can cover both English simple present and present progressive, depending on context.

So Jeg lager te can mean:

• I make tea
• I am making tea

Without the definite ending, kylling means chicken in a general food sense, similar to English.

• varmer kylling = heating chicken
• varmer kyllingen = heating the chicken

If you are talking about some specific chicken already known in the conversation, kyllingen would be more natural. But if you are just stating what food you are preparing, kylling is normal.

It can mean either, depending on context.

• En kylling løper rundt på gården. = A chicken is running around the farm.
• Vi spiser kylling til middag. = We eat chicken for dinner.

In your sentence, it clearly means the food, not a live animal.

Til middag means for dinner.

So:

• varmer kylling til middag = heating chicken for dinner

The preposition til is often used where English uses for in meal expressions:

• til frokost = for breakfast
• til lunsj = for lunch
• til middag = for dinner

Yes. This is standard Norwegian main-clause word order:

• Subject + verb + rest

So:

• Jeg = subject
• lager = verb
• te med en tepose = rest of the clause

Then the second coordinated verb phrase follows:

• og varmer kylling til middag

This is a very normal sentence structure in Norwegian.

Yes, you could. Jeg lager meg te means I’m making myself tea.

That version adds meg to show who the tea is for.

Compare:

• Jeg lager te = I’m making tea
• Jeg lager meg te = I’m making myself tea
• Jeg lager deg te = I’m making you tea

So the original sentence is perfectly correct, but meg could be added if that meaning matters.

Usually, yes, but it depends a little on culture and context.

In modern everyday Norwegian, middag usually means the main hot meal of the day, often translated as dinner. In some situations it can correspond more closely to the main meal, even if the timing is a bit different from what an English speaker expects.

So in this sentence, til middag is best understood as for dinner.