One month rent as a fee (vergoeding, bemiddelingskosten or huurkosten) for a place advertised by an agency is pretty standard (can be a lower set fee for cheap accommodation, I don't recall seeing more). Another model is for the landlord or landlady to pay for the agency fee, in which case the tenant does not have to pay anything. Yet, another model is to pay an agency some pre-defined fee upfront and have them look for unlisted places for you (not sure how common this really is but many agencies offer it).
Borgsom (the usual translation is "deposit", I have never heard "guarantee" but I suppose it might be the same) is indeed a sum of money you give to the landlord or landlady to cover damages to the property or rent arrears. You should get this money back at the end of the contract, if you make sure to end it following the procedure laid out in the contract (probably by certified mail, with one month notice). Here again, one month rent is standard but if you have a low income (compared to the rent) or a temporary job, you might be required to pay more (or, alternatively, to find a guarantor living in the Netherlands but that might be difficult for an expat).
Some agencies will also ask you for some form of registration fee (before letting you even see properties) or a prepayment to confirm your interest in a property (at that point, you might still be refused by the landlord or landlady and get that money back but you cannot walk out without losing it). If you do get the property you were interested in, such a prepayment would be counted towards the deposit and agency fees and you would only have to pay the difference before moving in.
Finally, note that unless it's a vacation rental, you will rarely find anybody willing to rent you their property for one month, certainly through an agency (if you are introduced to the landlord by the current tenant or you are subrenting, it might be possible but would still seem rather uncommon). All rental contracts I have ever seen in this country specify a one-year minimum rental period. It's only after the end of the first year that you can step out of the contract with one month notice (typically).