zitensya wo tyuurinzyou ni oite kara, eki made arukimasu.

を marks the direct object of the verb.

Here, the verb is 置く (おく) = to put / place / leave.
So 自転車を置く means to put/leave the bicycle.

In other words:

• 自転車 = bicycle
• を = marks what is being acted on
• 置く = to place / leave

So 自転車を tells you that the bicycle is the thing being left in the parking area.

With 置く, に marks the place where something is placed.

So:

• 駐輪場に置く = put/leave it in the bicycle parking area

This is different from で, which often marks the place where an action happens.
But with verbs of placement like 置く, に is the normal choice because it marks the destination/location where the object ends up.

Compare:

• 机に本を置く = put a book on the desk
• 部屋で勉強する = study in the room

So in this sentence, 駐輪場に is the correct grammar.

置いてから means after putting/leaving it.

This is the pattern:

• て-form + から

It means after doing X, do Y.

So:

• 置いて = the て-form of 置く
• から = after

Together:

• 自転車を駐輪場に置いてから、駅まで歩きます。
• After leaving my bicycle in the bike parking area, I walk to the station.

This pattern shows the order of actions very clearly:

1. leave the bicycle
2. walk to the station

Because てから and たから mean very different things.

• 置いてから = after leaving it
• 置いたから = because I left it

So:

• Vてから = sequence of actions
• Vたから = reason/cause

In your sentence, the speaker is describing what happens first and what happens next, so 置いてから is the right form.

The dictionary form is 置く (おく).

It changes like this:

• 置く → 置いて

This is the て-form.

For -く verbs, the て-form often changes like this:

• 書く → 書いて
• 置く → 置いて

So 置いてから is built from the dictionary form 置く.

まで means up to / as far as / until and marks the endpoint.

So:

• 駅まで歩きます = walk to the station

With 歩く, まで is very natural because it emphasizes the destination as the end point of the walking.

A learner may expect 駅に歩きます, but that sounds unnatural in Japanese.
If you want to the station, common choices are:

• 駅まで歩きます
• 駅に歩いて行きます

So in this sentence, 駅まで歩きます is a very natural way to say walk to the station.

Japanese -ます form is really non-past, so it can mean:

• present
• future
• habitual action

In this sentence, it most naturally means either:

• I will walk to the station or
• I walk to the station / I usually walk to the station

The exact time is understood from context.

So Japanese does not force the same present/future distinction that English does here.

The subject is omitted, which is very normal in Japanese.

A full version could be something like:

• 私は自転車を駐輪場に置いてから、駅まで歩きます。

But Japanese usually leaves out 私は if it is already clear from context.

So the sentence naturally sounds like:

• (I) leave my bicycle in the bike parking area, and then walk to the station.

The listener usually understands the subject from the situation.

Not literally. 置く basically means to put / place / leave.

But in context, when talking about a bicycle, English often translates it more naturally as:

• park the bicycle
• leave the bicycle

So:

• 自転車を駐輪場に置く

literally is closer to put/leave the bicycle in the bike parking area, but natural English may say park the bicycle.

This is a good example of how the most natural English translation is not always a word-for-word match.

駐輪場 (ちゅうりんじょう) is a bicycle parking area.

It is specifically for bicycles (and sometimes motorcycles), not for cars.

Compare:

• 駐車場 = car parking lot
• 駐輪場 = bicycle parking area

So if you are parking a bicycle near a station, 駐輪場 is exactly the right word.

The comma is mainly for readability.

In a sentence like this, the first part is a setup:

• 自転車を駐輪場に置いてから、

Then the main action comes:

• 駅まで歩きます。

The comma helps the reader see that break more easily. It is especially common after longer introductory phrases.

It is not always strictly required, but it is very natural here.

No. Normal Japanese is usually written without spaces.

A natural written version would be:

自転車を駐輪場に置いてから、駅まで歩きます。

The spaced version is just a learner-friendly format to make the parts easier to see.

That sounds unnatural.

With 置く, the place where something is placed is normally marked with に, not で.

So:

• 自転車を駐輪場に置いてから = natural
• 自転車を駐輪場で置いてから = unnatural

A good way to remember it is:

• に = where something ends up
• で = where an action takes place

Since 置く involves placing something somewhere, に is the usual choice.

Yes.

Because 歩きます is non-past, the sentence could describe:

• a one-time future action
  After I park my bicycle, I’ll walk to the station.

or

• a regular routine
  After I leave my bicycle in the bike parking area, I walk to the station.

Context tells you which one is intended. If this appears in a textbook without context, both are possible.