I've bought an Ibanez 12 string acoustic brand new online.
Do I tune the 12 string guitar like all the 6 string guitars I have.
Twelve string guitars have basic tuning the same as a 6 string (EADGBE) but the pairs are arranged a little differently:
For the thickest 4 pairs (EADG) the thinner string of each pair should be an octave higher than the thicker string
For the thinnest two pairs (BE) each string of the pair should be tuned in unison.
There is a handy tuner online at get-tuned.com - and they describe the tuning as:
where lowercase is an octave higher than its counterpart.
12 string tuning should be D G C F A D or you'll eventually split the top and also make the instrument difficult to play. Try it. Relieve the tension, save your guitar from over tuning. Make it sound better. Don't reply until you try