Yes but volume is low and u need a special cord that is universal like for a stereo or radio.

I tried a towel which didn't help. Right now I am using a cheap seat cover for a dinning room chair that I had extra.

I am 5'10" and found a perfect height for me. I read in a review where someone that was 5'2" had a bit of an issue, so a family member drilled another hole in the seat post allowing it to be lowered further. When looking at my bike just now, it looks like you could drill 2 more holes to lower the seat further. Hope this helps, it's a great bike!

No it is not.

No it does not, however you could use a step stool to hop up on this bike.

not at all

You can ride at any resistance level for as long as you want. You can adjust the resistance level any time you want through out the ride.

There are 8 pre-programmed programs varying in length from 20-30 minutes. The cool thing about the programs is that they go from the easiest which I believe only has resistance levels one and two up to the hardest , 30 minute level which for me right now is daunting. While on the programs, it wants you to stay in a certain zone. It will tell you if you need to pedal faster or if you need to slow down. But,you can choose your own resistance and then just bike 20-30 minutes at the rate you can ride. Another feature is the heartbeat monitor which will be helpful to you as the cardio and pulmonary are tied together so you can tell if you are working too hard. In short, there seems to be a program for most needs, or you can just ride.

I don't recall reading that it had a specific weight limitation but I am easily 220 pounds, maybe more. This is a solidly built product; strong welds and hardware. The bike doesn't sway or rattle when in use (be sure to tighten!) and makes no noise. I can easily picture someone over 250 pounds riding comfortably. The only negative is that your knees could possibly hit the handle bar if you are over 6'2". The answer to that problem would be to reverse the handle bars during assembly.

That happens only when you're doing a 30 min pre made workout. If you just set the intensity and ride, you wont get the beeping. The beeping is an indicator of time and intensity change.