Your lug pattern is 5 on 4½ (5 lugs, 4½" spacing). Most aftermarket wheels that increase in width over stock wheels should have the appropriate offset. Just ask for wheels for your application.
As for 33's, wait until you have the money for a lift too. 33's will scrape your fenders and flares all to hell, and may bind in the wheel wells if you get fully compressed on either side.
[b]'94 YJ Sahara Hardtop[/b]
4.0L / AX-15 / Stock NP231 / Stock D30 (open) / D60 (35-spline, Detroit locker, Moser axles) / rear disc brakes / 4.56 gears / Advanced Adapters SYE & CV Shaft / 33" BFG MT-KM's / Thorley Header / Magnaflow Muffler / BesTop Flares