kagu ga sukunai node, hikkosita ato de nantoka soroeru tumori desu.

In 家具が少ない, が marks furniture as the thing that is scarce.

• 家具が少ない = There is little furniture / The furniture is sparse
• 家具は少ない would put more contrast or topic emphasis on furniture, as in As for furniture, there isn’t much.

In this sentence, が sounds natural because the speaker is simply stating the situation that leads to the next action.

家具 is a collective noun, like furniture in English. It does not normally show singular vs. plural.

So 家具が少ない means:

• There isn’t much furniture
• We don’t have many pieces of furniture

Japanese usually leaves number unstated unless it matters.

少ない is the plain present form of an i-adjective.

Here it is being used to finish the clause:

• 家具が少ないので = because there is little furniture

You would use 少なく when the adjective connects to something else in a different way, for example:

• 家具が少なくて、不便です。 = There’s little furniture, so it’s inconvenient.

So in this sentence, 少ない is correct because it directly comes before ので.

Both ので and から can mean because, but ので usually sounds a bit softer, more explanatory, and less direct.

• 家具が少ないので = because there is little furniture
  This sounds like calmly giving a reason.
• 家具が少ないから would also be correct, but it can sound a little more straightforward or assertive.

In many everyday situations, ので is often used when explaining plans or circumstances politely.

When Japanese says after doing X, the verb before あと is usually in the plain past form.

So:

• 引っ越したあとで = after moving
• literally: at the time after having moved

This is a very common pattern:

• 食べたあとで = after eating
• 帰ったあとで = after going home

Even though the whole sentence may refer to the future, the action before あとで is marked in past form because it is treated as a completed action relative to what comes next.

In this sentence, あとで means after or after that.

• 引っ越したあとで = after moving

The で helps mark the time when the next action happens. In many cases, Vたあと and Vたあとで are both possible, but あとで is very common in natural speech and writing when introducing the next action.

So here, it smoothly connects:

• first: move
• then: manage to get the furniture together

何とか means something like:

• somehow
• one way or another
• manage to

It suggests that the speaker does not have a precise method yet, but believes they will find a way.

So 何とかそろえるつもりです gives the nuance:

• I intend to somehow manage to get everything together
• I’m planning to make it work somehow

It often carries a slightly hopeful or resourceful feeling.

そろえる means to gather, to get together, to complete a set, or to make things ready.

In this sentence, it means something like:

• to get the necessary furniture together
• to furnish the place
• to acquire what’s needed

The idea is not just buy one thing, but assemble the needed items as a set.

These are a common transitive/intransitive pair:

• そろう = things come together / become complete
• そろえる = to gather things / make them complete

Examples:

• 家具がそろう = The furniture is all in place
• 家具をそろえる = to get the furniture together

In your sentence, the speaker is the one intending to do the action, so そろえる is used.

The object is omitted because it is easy to understand from context.

The sentence has already mentioned 家具, so Japanese does not need to repeat it:

• full idea: 家具を何とかそろえるつもりです
• actual sentence: 何とかそろえるつもりです

This kind of omission is very common in Japanese when the meaning is already clear.

つもりです means intend to or plan to.

• そろえるつもりです = I intend to get everything together
• I’m planning to do that

It expresses the speaker’s intention, not a guaranteed future fact. It is stronger than a vague idea, but still about personal plans.

For example:

• 旅行するつもりです。 = I intend to travel.
• 日本語を勉強するつもりです。 = I plan to study Japanese.

So here, the speaker is saying this is their plan after moving.

Japanese often puts background information or reasons before the main statement.

So the sentence structure is:

• 家具が少ないので = reason/background
• 引っ越したあとで何とかそろえるつもりです = main plan

This is very natural in Japanese. It lets the listener understand the situation first, then hear what the speaker intends to do about it.

Yes, in many situations they are quite close.

• 引っ越したあとで = after moving
• 引っ越してから = after moving / once I move

The difference is subtle:

• Vたあとで often focuses on sequence: first this happens, then that happens.
• Vてから also means sequence, but often feels a bit more like once that is done.

In this sentence, either could work, but 引っ越したあとで neatly highlights the timing of doing the furnishing after the move is completed.