Private transport
Private transport is available at least in two ways:
Rent a car
It's very popular, but not really for students, since prices are are quite high. Offers are very flexible and of course offer a lot of freedom. There are lots of agencies that offer this kind of services, some of the are listed below.
http://www.atet.si/?ad=rcsj&gclid=CJnRzKG475oCFQ8eZwodMVQxGA
http://slovenia.rentalcargroup.com/?gclid=CLSOxLS475oCFRK7ZwodVnGICQ
http://www.avantcar-slovenia.com/
and many, many more...
Taxi
If you are in a hurry or you are just lost, probablly the smartest thing is to take a taxi. There is plenty of taxi companies, especially round stations, hotels in the city centers where there is a lot of people. Prices are quite decent but be carful, most of taxi drivers are honest but you never know who you might get. Taxi should have taximeter and the price should be the result of the kilometers driven and shown on display. Taxi driver should also give you a bill. Number of taxi companies are listed below.
http://www.sloveniaholidays.com/prevozi/taxi
http://www.taxi-bohinj.com/storitve/
http://www.taxi-business.eu/?lang=en
You can get an avio taxi,
and a lot of local taxis,
http://www.computel.si/taxi/index.asp
Plan a trip: link
Map of Slovenia: link
Find an address: link (not in english but it's very easy to use)