yīguì hé shūjià dōu yào ānzhuāng.

Mandarin often drops the subject when it is clear from context.

So 衣柜 和 书架 都 要 安装 can work as a complete sentence even without saying who is doing the installing. Depending on context, it could mean:

• the wardrobe and bookshelf both need to be installed
• we need to install the wardrobe and bookshelf
• someone needs to install both of them

Chinese usually leaves this unspecified unless it matters.

都 means both or all, depending on what comes before it.

In this sentence, it refers to 衣柜 和 书架, so it means:

• the wardrobe and the bookshelf both need installation

A very common pattern is:

• A 和 B 都 + verb/adjective

Examples:

• 我和他都喜欢咖啡。
  He and I both like coffee.
• 这个和那个都很贵。
  This one and that one are both expensive.

So here, 都 marks that the statement applies to both items.

Because 都 usually comes after the group it refers to and before the predicate.

Structure:

• [the people/things included] + 都 + [what is true about them]

So:

• 衣柜 和 书架 都 要 安装

Not:

• 都 衣柜 和 书架 要 安装

That would sound ungrammatical in standard Mandarin.

Here 要 means something like need to or are going to be required to.

In different contexts, 要 can mean different things:

• want to
  我要喝水。 = I want to drink water.
• need to / should
  你要早点睡。 = You need to sleep earlier.
• be going to / will
  要下雨了。 = It is going to rain.

In 衣柜 和 书架 都 要 安装, the most natural meaning is need to be installed.

Chinese often expresses passive-like meanings without using 被.

So 都要安装 can naturally mean:

• both need installing
• both need to be installed

Even though English uses passive wording, Mandarin does not have to mark it explicitly.

Using 被 here would usually sound unnecessary unless you specifically want to emphasize the passive action or the agent.

Natural:

• 衣柜和书架都要安装。

Less natural in ordinary context:

• 衣柜和书架都要被安装。

Yes, sometimes 组装 could be used, but the meaning is slightly different.

• 安装 = install, set up, fit into place
• 组装 = assemble from parts

So the choice depends on the situation:

• If the wardrobe and bookshelf are being put together from flat-pack pieces, 组装 may fit well.
• If they are being installed or set in place, 安装 is more natural.

In real life, furniture can sometimes take either verb depending on what exactly is happening, but 安装 sounds broader and more general here.

Yes, here 和 simply means and, joining two nouns:

• 衣柜 和 书架 = wardrobe and bookshelf

It is one of the most common ways to connect nouns in Mandarin.

Other words can also mean and in some contexts, such as:

• 跟
• 与

But 和 is very common and neutral.

Not if you want the meaning both.

• 都 means the statement applies to all listed items.
• 也 means also.

So:

• 衣柜和书架都要安装。
  The wardrobe and the bookshelf both need to be installed.

• 衣柜和书架也要安装。
  The wardrobe and bookshelf also need to be installed.
  This suggests something else also needs installation.

So 也 changes the meaning.

Mandarin does not use articles like a or the, and nouns usually do not change form for plural.

So:

• 衣柜 can mean a wardrobe, the wardrobe, or wardrobes, depending on context
• 书架 can mean a bookshelf, the bookshelf, or bookshelves

In this sentence, context tells us that specific items are meant.

This is very normal in Chinese. You often do not mark definiteness or plurality unless needed.

Yes, but the emphasis changes.

• 衣柜和书架都要安装。
  Focuses on the two items, and says both of them need installation.

• 要安装衣柜和书架。
  Means need to install the wardrobe and bookshelf, but it does not explicitly highlight both in the same way.

So the original sentence is especially good if you want to stress that neither item is excluded.

Yes, it is natural and concise.

In conversation, speakers might also say slightly fuller versions like:

• 衣柜和书架都要安装一下。
• 衣柜和书架都得安装。
• 衣柜和书架都需要安装。

But 衣柜 和 书架 都 要 安装 is perfectly natural, especially in practical contexts such as moving house, buying furniture, or giving instructions.

Here 都 is normally pronounced dōu.

So the sentence is:

• 衣柜 yīguì
• 和 hé
• 书架 shūjià
• 都 dōu
• 要 yào
• 安装 ānzhuāng

Learners sometimes see 都 pronounced as dū in some words or set expressions, but in this sentence the standard pronunciation is dōu.