What are the oxidation states for each element in the equation 3HCl(aq)+HNO3(aq)-> Cl2(g)+NOCl(g)+2H20(l)?

Answer 1

You need the practice of doing these.
H is+1, Cl is -1, N is +5 in HNO3 and O is -2. I'll leave the others for you. Here is a site that should help if you have trouble.
http://www.chemteam.info/Redox/Redox-Rules.html

Answer 2

So would N be +3 in NOCl?