Marie aime cet endroit, elle y trouve du chocolat et une glace sans dépenser tout son budget.

Because endroit is masculine singular and starts with a vowel sound. In French, ce becomes cet before a masculine singular noun beginning with a vowel or a mute h.

• ce livre = this book
• cet endroit = this place
• cet hôtel = this hotel

So ce endroit is not correct.

Y means there or in/at that place. It replaces the location already mentioned: cet endroit.

So instead of repeating the noun, French uses y:

• Marie aime cet endroit. Elle y trouve...
  = Marie likes this place. She finds ... there.

It is a very common pronoun for places introduced by ideas like there, in it, at that place, or to it.

In French, pronouns like y, en, le, la, and les usually come before the conjugated verb.

So:

• elle y trouve = she finds there / she finds in that place

Not:

• elle trouve y ❌

This word order is normal in French, even though it feels different from English.

Du chocolat uses the partitive article, which often means some with things that are not usually counted individually.

Here, chocolat is treated as an uncountable thing, so:

• du chocolat = some chocolate

French often uses du / de la / de l' where English may simply use no article:

• Je mange du pain = I eat bread / I’m eating some bread
• Elle trouve du chocolat = She finds some chocolate

Here, une glace most naturally means an ice cream.

In French, glace can mean different things depending on context:

• glace = ice
• une glace = a mirror
• une glace = an ice cream

In a sentence about finding food without spending too much money, une glace is understood as an ice cream.

It uses une because it refers to one item, something countable.

After sans, French often uses the infinitive when the subject stays the same.

Here, Marie is the one who:

• likes the place
• finds chocolate and an ice cream
• does not spend all her budget

So sans dépenser means without spending.

A good literal breakdown is:

• sans = without
• dépenser = to spend

This is a very common structure in French:

• sans parler = without speaking
• sans attendre = without waiting
• sans dépenser = without spending

Because budget is a masculine noun in French.

Possessive adjectives agree with the noun possessed, not with the person who owns it.

So even though Marie is female, French uses:

• son budget = her budget

Compare:

• son livre = his book / her book
• sa voiture = his car / her car

The form tells you the gender of the noun, not the gender of the owner.

Tout son budget means all her budget or more naturally her whole budget.

• tout = all / whole
• son budget = her budget

So the idea is that she can get those things without spending all the money she has available.

In English, without spending her entire budget would be a very natural translation.

They are in the present tense: aime and trouve are both present indicative forms.

In French, the present tense can mean:

• something happening now
• a habit
• a general fact

Here it most likely describes a general situation or something habitually true about Marie and this place:

• she likes this place
• she finds chocolate and an ice cream there
• she does this without using up all her budget

So it does not have to mean that this is happening at this exact moment.

Because the sentence has another clause with its own verb: elle y trouve.

French normally needs the subject to be stated again with a new finite verb, so:

• Marie aime cet endroit, elle y trouve...

You generally would not say:

• Marie aime cet endroit, y trouve... ❌

The repeated elle makes the second clause complete and grammatical.