S.,
I have two children, 5 1/2 years old and 3 1/2 years old. My daughter had bi-lateral ear tubes put in when she was 14 months old. She had been getting plenty of ear infections from about 5 months on. After my son was born, the ENT specialist (ear, nose, throat doctor) said not to be surprised if he would also need tubes as ear infections run in families and are usually worse with boys. Subsequently, he had tubes put in just after his 1st birthday due to frequent ear infections.
In both surgeries, the kids were given anesthetic to put them to sleep. The surgery takes only about 5-6 minutes and they are under for about 10 minutes. It was very nerve racking for us when our daughter received tubes and not so bad the second time around.;-)
The worst part of the procedure is when it is over and the child is waking up from the anesthetics. They are a little disoriented and don't feel well, so they cry a lot! Just be prepared for this and have their favorite stuffed animal or whatever and know that you'll might be holding a crying baby for a while until he settles down.
As for adenoid removal, I would only do as much as the doctor says and not "push" for more. Usually ear infections are caused from having too short ear canals (until they grow) so any sinus drainage goes into the ears and causes infections.
Hope this helps!
R..