The entire city is clean and well organized, making walking an excellent and enjoyable way to get around.
Rent a bike in Bikes4Rent (http://www.bikes4rent.dk/) or better yet, borrow a free City Bike, available around in the city. You need to insert a DKK 20 coin, which you get back when leaving the bike in another "bike station" not available during winter months.
Bus tickets for travel within the city limits Aarhus Kommune limits are 20 DKK, 10 DKK if you are under 16 years of age (http://www.midttrafik.dk/...). Tickets are also available in 10-trip tickets, that vary in price depending on how far you want to go 120 DKK - 220 DKK, cheaper cards are also available for under 16 year olds). Finally there are tickets that allow you to ride all you want for 30 days, again prices vary depending on how far you want to go.
You can also buy a cheap Aarhus Pass (http://www.visitaarhus.co...) which covers all bus transport and all the museums.
By taxi
Airporttaxi.dk - Book and pay for your taxi online. 10% savings (http://www.airporttaxi.dk).
Aarhus Taxa - 89 48 48 48 (http://www.aarhus-taxa.dk).
Taxamotor Aarhus - 70 33 83 38 (http://www.taxamotor.dk/).
JetCab Bike Taxi- No phone No. (http://www.jetcab.dk/cyke...).