Sharp, good quality tools are a must if you're going to prune your own trees. As you're not going to let the trees get out of control, you won't need a chain saw or anything other than loppers, a pruning saw, bow saw and pruners.
I keep all my pruning tools sharp - there is no point in attempting to prune a tree only to find a couple of years later that they can't heal from the damage inflicted on them by poorly maintained tools.
Here are a few of the most used tools in my pruning tool kit;
The bow saw is very economical, and good for rough cutting; this is not good for surgical cuts, but is great for lopping off large branches which you will fine tune with the folding saw. This has fine teeth, and cuts on the back stroke, making it easy to handle in the tree canopy.
Loppers like these are called bypass loppers, with a blade that passes by to cut, not an anvil type which can crush and damage the delicate bark.
Keeping them clean is relatively quick; after using the tools, wipe them with a rag soaked in rubbing alcohol. If you're dealing with a diseased tree, do this after each cut. Labor intensive, I know, but well worth the effort so you don't transfer pathogens throughout the tree.
A shot of WD40 or other spray lubricant will keep the rust from forming, and keep all moving parts free. Store in a dry place until the next pruning session.