How to literally take the wing off a single engine Beechcraft-style airplane?
A normal collection of combination wrenches and sockets, in inches, plus pliers, wire cutters etc, the ole' help along hammer, small bolt cutters for cutting control cable, etc. should do the trick.  Maybe sawhorses to rest the fuselage and wing on.  If the wings are individually removable, they'll be attached with two big bolts or two rows of smaller bolts, just inside the cabin under the seats, and a singe bolt at the back on each side.

The main thing to take care with is there'll be a hydraulic line running out the wing root to the landing gear leg with red hydraulic fluid (similar to ATF fluid) in it for that side's brake, so you should disconnect at each end and drain the brake line first, and there is probably a fuel tank so you need to make sure that is drained and be ready to catch fuel when you disconnect the fuel line connection at the fuselage.   If it's been sitting there for years the fuel is probably all gone but best be ready just in case.  Bring along a fire extinguisher while you're at it. 

It's not much different than cutting up a car except the metal is easier to hack at if you want to take the sawzall to it.