Go inside the building at Al-Kharid duel arena.
In the duel arena, its 1 vs. 1, however in certain parts of the wilderness you can yes.
Well obviously, It's the prayer altar at 5 east 7 north and 28 west.
Sadly no, any arrows, Runes or bolts used inside the duel arena don't get reimbursed.
There is no ticket office, however if you are after tickets to get into the desert, you will want the shantay pass, it is the other end of al-kharid.