I'm going to recommend some reading rather than specific tools. If your bike has cottered cranks for example, you're going to need a different set of tools than if your bike has more modern 3 piece cranks.

I would take a look at Sheldon Brown's website. A book called "Zinn and the Art of Bicycle" maintenance might be very helpful too. It would be great if it could be found at your local library.

Cone wrenches for wheel bearings are pretty generic but removing freewheels takes a tool specific for the type of freewheel you have. Some bike shops will take the freewheel off for next to nothing. You might want to see if you can find a Bike Co-Op near by. One near me has work space available for rent and is stocked with commonly used tools.