sinseki ga kuruma wo dasite kureru node, watasitati ha densya de ikanakute sumimasu.

It means something like to provide a car for us, to drive us, or to go to the trouble of bringing out the car for our sake.

The verb 車を出す literally means to take out the car, but in real Japanese it often means:

• to use one’s car for someone
• to drive someone somewhere
• to make a car available

So 親戚が車を出してくれる means the relative is doing that as a favor for us.

The て + くれる pattern shows that someone does something for the speaker or the speaker’s in-group, and that the action is viewed as a benefit.

So:

• 親戚が車を出す = A relative will use/bring the car
• 親戚が車を出してくれる = A relative will do that for us, kindly / as a favor

This is a very common Japanese way to show that an action benefits the speaker.

が marks 親戚 as the subject of the clause:

• 親戚が = the relative is the one who will provide the car

In this sentence, the relative is new or important information in that clause, so が sounds natural.

If you said 親戚は, it would feel more like as for my relative..., putting them in topic position and possibly creating a contrast.

は marks 私たち as the topic of the second clause:

• 私たちは電車で行かなくて済みます = as for us, we won’t have to go by train

So the sentence is roughly structured like this:

• 親戚が ... = the relative does the helpful action
• 私たちは ... = as a result, we are affected this way

This contrast between が and は is very common.

ので means because or since.

It connects the first clause to the result in the second clause:

• 親戚が車を出してくれるので = because our relative will provide the car
• 私たちは電車で行かなくて済みます = we won’t have to go by train

Compared with から, ので often sounds a little softer, more explanatory, and less direct.

Both can mean because, but the nuance is a bit different.

• ので: softer, more explanatory, often a little more formal or neutral
• から: more direct, more assertive, often more conversational

So:

• 親戚が車を出してくれるので... sounds like a calm explanation
• 親戚が車を出してくれるから... sounds a bit more straightforward

Both are possible here, but ので fits well.

Because て-form + くれる is a set grammar pattern.

It works like this:

• 出す = to put out / provide / bring out
• 出してくれる = to do that for me/us

The て-form connects the main action to the giving/benefit verb くれる.

This pattern is extremely common:

• 教えてくれる = teach me/us
• 手伝ってくれる = help me/us
• 送ってくれる = take me/us / send me/us

It means we can avoid having to go or we won’t have to go.

This grammar is built from:

• 行かない = do not go
• 行かなくて = not doing / without doing
• 済む = to be settled, to be enough, to get by

So 行かなくて済む literally means something like:

• it is settled without having to go
• it can be managed without going

In natural English, that becomes:

• we won’t have to go
• we can avoid going

Very often, yes.

This pattern often suggests:

• something was possible or expected
• but now it is unnecessary
• and that is convenient or fortunate

So here, there is often a slight nuance of:

• Luckily, we don’t have to go by train

The feeling of relief is not always very strong, but it is commonly present.

Here で marks the means of transportation.

So:

• 電車で行く = go by train
• 車で行く = go by car
• バスで行く = go by bus

In this sentence:

• 電車で行かなくて済みます = we won’t have to go by train

Because 車 is the thing being put out / provided / brought into use by the verb 出す.

So:

• 車を出す = to bring out the car / provide the car / use the car for someone

Even though the natural English translation may sound more like drive us or give us a ride, Japanese still uses 車を because the car is the thing being acted on by 出す.

By itself, 親戚 can mean a relative or relatives, depending on context.

In this sentence, it is usually understood as:

• a relative
• or one of our relatives

If you wanted to make the plural more explicit, Japanese might use context or wording like:

• 親戚の人
• 親戚たち (less common in ordinary use)

So yes, 親戚 here is most naturally read as a relative.

Because Japanese often leaves out information that is already understood from context.

The sentence only focuses on:

• the relative will provide a car
• so we do not need to go by train

The destination is probably already known in the conversation, so it does not need to be repeated.

This kind of omission is extremely common in Japanese.

Not directly, because those verbs describe the same event from different viewpoints.

• くれる = someone gives to me/us
• もらう = I/we receive from someone
• あげる = someone gives to someone else

So the sentence uses くれる because the speaker is viewing the action from the perspective of receiving a favor.

A version with もらう would need a different structure, for example:

• 私たちは親戚に車を出してもらうので...

That means something like because we are having our relative provide the car for us...

Yes. It is in polite style because it ends with 済みます.

The plain-style version would be:

• 親戚が車を出してくれるので、私たちは電車で行かなくて済む。

Everything else in the sentence is neutral, but the final verb makes the overall sentence polite.

It breaks down like this:

• 親戚が = a relative
• 車を出してくれる = will provide the car for us
• ので = because / since
• 私たちは = as for us
• 電車で = by train
• 行かなくて済みます = won’t have to go / can avoid going

So the logic is:

Because a relative will provide a car for us, we won’t have to go by train.

Yes, that would sound unnatural in English.

A literal translation helps you understand the Japanese pieces, but in natural English you would normally say:

• A relative is going to drive us
• A relative will give us a ride
• A relative will provide the car
• Since our relative is driving, we won’t have to go by train

So it is better to understand the literal meaning in Japanese, but translate it naturally in English.