You must mean Bb "in" the staff. I would suspect that perhaps the Bb key itself may be leaking. The low Bb pad not closing by itself should be a simple fix. usually a small piece of dampning material has fallen off so that it's lever can't close it all the way. If that's all it is then it's a fix that can happen as quickly as a small piece of cork can be cemented in and adjusted, just a few minutes. The G could be an octave timing issue. However, it's quite possible there are a number of other problems. A good technician should be able to assess the problems in just a few minutes and give you a quote. most places I've heard of will take a look free of charge.