Tolong taruh keset itu di depan pintu kamar mandi.

Yes. Tolong is commonly used to make a request more polite, much like please in English.

In this sentence, Tolong taruh... means something like Please put...

A useful thing to know is that tolong originally has a sense of help, so in some contexts it can feel like please help by... But in everyday requests, it often just works as please.

Examples:

• Tolong buka pintunya. = Please open the door.
• Tolong tunggu sebentar. = Please wait a moment.

Taruh means put, place, or set down.

It is a very common everyday verb for physically placing something somewhere.

So:

• taruh keset itu = put that doormat

Similar verbs:

• letakkan = place, put down; slightly more formal or careful-sounding
• simpan = store, keep, put away
• pasang = install/attach/put on, used for things like signs, bulbs, or equipment

In casual speech, taruh is very natural here.

In Indonesian, demonstratives like ini (this) and itu (that) usually come after the noun, not before it.

So:

• keset itu = that doormat
• pintu ini = this door
• rumah itu = that house

This is one of the most important word-order differences from English.

Keset usually means a doormat or small floor mat, especially one used near an entrance or bathroom.

In this sentence, because it is being placed in front of the bathroom door, doormat is a very natural interpretation.

So keset is not just any large rug or carpet:

• keset = small mat / doormat
• karpet = carpet / rug

Di depan means in front of.

Here:

• di = at / in / on, a location marker
• depan = front

Together:

• di depan = in front

Then you add the thing being referred to:

• di depan pintu = in front of the door
• di depan rumah = in front of the house

So:

• di depan pintu kamar mandi = in front of the bathroom door

Because this di is a preposition meaning at/in/on.

In Indonesian:

• di as a preposition is written separately
• di- as a passive verb prefix is written attached

Examples:

• di depan pintu = in front of the door
• di kamar = in the room

But:

• ditaruh = is put / is placed
• dibuka = is opened

So in your sentence, di depan is definitely the location preposition, which is why it is written as two words.

Indonesian often links nouns directly, with the main noun first and the describing noun after it.

So:

• pintu kamar mandi literally = door bathroom room
• natural English = bathroom door

The first noun is the main thing:

• pintu = door

The words after it specify what kind of door:

• kamar mandi = bathroom

Other examples:

• meja makan = dining table
• pintu depan = front door
• tas sekolah = school bag

So pintu kamar mandi is a normal noun phrase in Indonesian.

Kamar mandi literally means bathing room, but in real usage it usually means bathroom.

Depending on context, it can refer to:

• a bathroom
• a washroom
• sometimes a toilet area

Related words:

• toilet = toilet/restroom, also common in Indonesian
• WC = toilet/restroom, also very common
• kamar kecil = literally small room, a polite way to refer to the toilet in some contexts

In this sentence, kamar mandi is perfectly natural.

The subject is omitted, which is very common in Indonesian, especially in commands and requests.

This sentence is understood as being directed to you:

• Tolong taruh keset itu... = Please put that doormat...

Indonesian often leaves out pronouns when the meaning is clear from context.

If you wanted to include the subject, you could say:

• Tolong kamu taruh keset itu...

But that is usually unnecessary, and in some contexts it can even sound a bit too direct.

No, Indonesian verbs do not change form for tense the way English verbs do.

Taruh stays taruh regardless of whether the action is present or future. The time is usually understood from context.

In this sentence, because it is a request or command, it clearly refers to a future action:

• Please put that doormat...

If needed, Indonesian can add time words:

• sekarang = now
• nanti = later
• besok = tomorrow

But no tense ending is required on the verb.

Yes, it is natural and reasonably polite.

Tolong + verb is a standard polite way to ask someone to do something.

Tone can vary depending on context:

• Taruh keset itu di depan pintu kamar mandi. = Put that doormat in front of the bathroom door.
  This is more direct.
• Tolong taruh keset itu di depan pintu kamar mandi. = Please put that doormat in front of the bathroom door.
  This is softer and more polite.

If you wanted to sound even softer, you could say:

• Tolong taruh keset itu di depan pintu kamar mandi, ya.

The ya can make it sound friendlier or gentler.

Yes. Tolong letakkan keset itu di depan pintu kamar mandi is also correct.

The difference is mostly one of style:

• taruh = common, everyday, conversational
• letakkan = a bit more formal or careful

Both are natural, but taruh sounds very normal in everyday speech.

The pattern is:

Tolong + verb + object + location

So here:

• Tolong = please
• taruh = put
• keset itu = that doormat
• di depan pintu kamar mandi = in front of the bathroom door

This pattern is very common in Indonesian requests:

• Tolong ambil buku itu. = Please take that book.
• Tolong buka jendelanya. = Please open the window.
• Tolong simpan tas ini di meja. = Please put this bag on the table.