Этот дом стоит миллион.

Yes, стоять very often means to stand, but it also has another common meaning: to cost.

So:

• Дом стоит у реки. = The house stands / is located by the river.
• Дом стоит миллион. = The house costs a million.

Russian uses the same verb for both ideas, and the context tells you which meaning is intended.

Because дом is a masculine singular noun, and этот has to agree with it.

Russian demonstratives change form depending on gender and number:

• этот дом = this house, this building
• эта книга = this book
• это окно = this window
• эти дома = these houses

So этот is used because дом is masculine.

Yes. Дом is the subject, and стоит agrees with it.

So the structure is basically:

• Этот дом = subject
• стоит = verb
• миллион = the amount / price

That is why the verb is singular: the subject дом is singular.

It absolutely can be:

• Этот дом стоит миллион рублей.

That is the fuller version.

In everyday speech, Russian often leaves out the currency if it is obvious from context. So миллион by itself can mean a million in the understood currency.

Whether that sounds natural depends on context. If everyone already knows you are talking about rubles, omitting рублей is normal.

In this sentence, the normal form is миллион.

For a learner, the easiest and safest thing is to memorize the pattern:

• стоить миллион
• стоить сто рублей
• стоить пять долларов

Price expressions with numerals have some grammar details that can get messy, especially with bigger numbers, but in this sentence миллион is the standard form. Миллиона would not be correct here.

It can often be understood either way, depending on context.

• In a sales context, it often means costs a million.
• In a more general evaluative context, it can feel like is worth a million.

Russian стоить covers both ideas more easily than English does. If the speaker wants to be very explicit, the surrounding context usually makes it clear.

Yes, but the neutral, most natural order is:

• Этот дом стоит миллион.

Russian word order is flexible, so other orders are possible for emphasis, but they sound less neutral. For example:

• Стоит этот дом миллион. — possible, more conversational or contrastive
• Миллион стоит этот дом. — much more marked, usually only for strong emphasis

For basic everyday Russian, stick with Этот дом стоит миллион.

It is present tense.

Here are the matching forms:

• Этот дом стоит миллион. = present
• Этот дом стоил миллион. = past
• Этот дом будет стоить миллион. = future

So стоит means costs / is costing in the present.

You would say:

• Этот дом не стоит миллион.

If you want contrast, you can also say:

• Этот дом стоит не миллион, а два. = This house costs not one million, but two.

So не simply goes before the verb:

• не стоит

It behaves like a numeral word, but grammatically it also has noun-like behavior in Russian.

That is why expressions with миллион can feel a little different from simple numbers like два or пять. For everyday use, though, you do not need to analyze it too deeply. Just learn common patterns such as:

• миллион рублей
• два миллиона рублей
• стоит миллион

That will take you a long way.

Yes, it is natural, especially in conversation, if the currency is understood.

Still, in many real situations, a speaker might be slightly more explicit and say:

• Этот дом стоит миллион рублей.

So the shorter sentence is natural, but the fuller version may be more common when the speaker wants to avoid ambiguity.