Stick it on a hoist (with wheels loaded as normal) and get underneath to see what is rubbing where and if there is any suspension/steering arm damage. It might even be something as simple as the limit studs may have been played with. All the other suggestions here (e.g bd581) are valid too. If you are not mechanically competent, then get some who is to do it, as well as check alignments and stops.
If you bought it privately, God knows what the previous owner might have been playing with, or hit.
This is why I sometimes really squirm at some of the things I see folks here proposing doing to their cars too. Sooner or later, some guy is going to be like you, and finding out too late that some mechanical bastardry has been perpetrated on their new pride and joy. Bear it in mind guys.
CP_e Standback & PNP; CP_e 3" SS Downpipe; Corksport FMIC with Top-mount K&N filter & OEM Ram CAI; Turbosmart BOV; Dashhawk; Prosport Boost Guage; JBR solid shift bushes; DBA 4000 Wiper-Slot front rotors; Hawk Ferro-Carbon HPS Street front brake pads (@ 69,000km); Sumitomo HTRZIII's in 225/45 x 18