Choose your chisel width to match the width of your mortices. Akthough you will certainly find exceptions, most joinery is either 1-1/2" mortices set in 1-1/2" off the reference face, or 2" mortices set in 2". (My last project was 1-1/2" mortices set in 2"). Usually the mortice width is consistent throughout the frame. Choosing the width of your chisel to the width of the mortice will make cleaning up faster. Put a ruler to the chisel and make sure it isn't undersized. Oversized chisels can be ground.

For saws, I like an old Disston rip saw from the flea market. Rip saws are easy to re-sharpen. For x-cut, I've been using Stanley Sharptooth saws. They last for about 2 frames, and at $15 can be thought of as disposable. A good 8 point x-cut can be had from the fleas as well, but the sharpening learning curve is steeper than for rips.

Cheers,
Dan