30 inch tires are a bit big for a Ranger. Not that it would look bad but the engine will have trouble turning that much mass. A 3"lift should more than take care of that and you may want to either extend the front bumper out a inch or so OR trim the trailing edge a little to keep tires off of it.
If you are going to go that large on that small of a truck, May I suggest a local racing shop to get a replacement set of differential gears to ease the load on the engine and tranny.
Wheel prices as well as tire prices vary according to your desires. That is something hard to estimate but basic tires that size will run about $125.00 each X 4 Plus rims and mounting and balance. Could be six hundred bucks could be 5 thousand bucks.