Torque is the rotational force produced by the engine: that obviously has nothing to do with the weight of the wheels and will remain unaffected. The amount of torque available to turn the wheels depends on the gear ratios, thus it will remain unaffected too.
Top speed will be determined by the effective gearing ratio in top gear and the horsepower of the engine. If the overall diameter of the wheel and tire assembly remains the same then the effective gearing will not change, and if the vehicle has the proper engine and aerodynamic characteristics, then the top speed will remain the same.
However, two things will be affected: a) the rotational inertia of the drivetrain, which is inversely related to the acceleration, i.e a heavier set of wheels will increase the rotational inertia and this will slow down acceleration, and b) the ratio of unsprung mass to sprung mass will increase, decreasing the compliance of the suspension. Taken together, a heavier set of wheels and tires, everything else remaining the same, will cause a vehicle to accelerate more slowly and crash into bumps more harshly.
For your last question, I need to know what you mean by "cruiser".
Generally speaking, steel wheels are heavier than their equivalent alloy counterparts. With alloy wheels, it depends on how the alloy wheels are formed. Generally cast alloys as heavier than spun cast alloys, which are heavier than forged alloys which are heavier than drop forged alloys which are heavier than three piece alloys for a given size and width. Chrome is just a type of finish and generally adds only a little bit of weight to the wheel.
For wheels and tires, generally lighter weights will give better results for road cars. Off-road vehciles have different requirements and generally not as badly affected by this variation.