Well, first determine what you budget it. A Jeep with 200,000 is no biggie because when the motor goes, ya slap in another $1700 motor and run it for another 200,000 miles. The main thing is the frame...if it has very little rust or corrosion, then the Jeep is worth investing money into.
A popular way to run 33's is 3" Springs, 1-1.125" Body Lift, and a 1" Motor Mount Lift (plus a few other items). This will get you the clearance needed and keep the cost down.
If you decide on 4" springs, then you pretty much need a SYE/CV drive shaft to go with it. (Lots of the threads on here about the SYE/CV modification.) Control arms and lots of other goodies to do it right . There are kits out there that have a 2" transfercase drop included as a cheap alternative to the SYE/CV...but why lift 4" inches just to drop 2" in the belly....that is silly.
The route I went was 33" Duratracs and a Zone 4.24" Combo lift. Very happy with the combination and was about $1500 total and highly recommend it.