Bir milyar lira çok para.

In Turkish, the verb to be is often left out in the present tense when the subject is he/she/it or a noun phrase.

So:

• Bir milyar lira çok para = A billion lira is a lot of money

This is completely normal Turkish.

If you want a more formal or emphatic version, you can add the copular ending:

• Bir milyar lira çok paradır

That -dır adds a slightly more formal, general-truth tone.

Here, bir is part of the number bir milyar, so it means one.

• bir milyar = one billion

But bir can also work like a/an in other sentences:

• bir kitap = a book
• bir adam = a man

So bir can mean either one or a/an, depending on context. In this sentence, it is clearly the number.

After numbers, Turkish nouns usually stay singular, not plural.

So Turkish says:

• iki kitap = two books
• on lira = ten lira
• bir milyar lira = one billion lira

This is different from English, where count nouns usually become plural after numbers. In Turkish, the number already shows plurality, so the noun does not need a plural ending.

Because lira is a specific currency unit, while para means money in a general sense.

So:

• lira = lira, the unit of currency
• para = money

The sentence is not just naming an amount. It is saying that this amount counts as a lot of money.

That is why çok para is used.

Compare:

• Bir milyar lira = one billion lira
• Bir milyar lira çok para = one billion lira is a lot of money

Çok para means a lot of money.

Here, çok is modifying para:

• çok = much / many / a lot
• para = money

Together:

• çok para = a lot of money

You sometimes can say just çok if the context is already clear:

• Bir milyar lira çok = A billion lira is too much / is a lot

But çok para is more complete and more explicit. It sounds like a full noun phrase: a lot of money.

Turkish often puts the main predicate at the end of the sentence.

Here the sentence structure is:

• Bir milyar lira = subject/topic
• çok para = predicate

So the sentence literally follows a pattern like:

• One billion lira
  • a lot of money

This is normal Turkish word order for a sentence with a nominal predicate.

English needs is in the middle, but Turkish does not in this kind of present-tense sentence.

Yes. That is grammatical.

• Bir milyar lira çok para = normal, natural, everyday style
• Bir milyar lira çok paradır = more formal, more emphatic, more like a statement of fact

The -dır ending is often used in:

• formal writing
• definitions
• general statements
• emphasis

In casual speech, it is often omitted.

Yes. In modern Turkish:

• milyon = million
• milyar = billion = 1,000,000,000

This is important because learners sometimes confuse milyar with the old English word milliard. But in normal modern English translation, milyar is billion.

So:

• bir milyon = one million
• bir milyar = one billion

Not in the same way English marks things with the or a.

Turkish has no article like the, and bir only sometimes acts like a/an. In this sentence, bir is part of the number, so it is not really functioning as an article.

Also, çok para is a general predicate phrase, not something like the lot of money.

So the sentence is simply making a general statement:

• One billion lira is a lot of money

without needing articles the way English does.