Just got a 2000 Volvo S70 (GLT/SE):: Few questions/problems?

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I just bought 2000 S70 GLT/SE with 128K miles, and had a few questions.

1) The front passenger power window switch is not working, though i am able to open the window through the river side controls. the lock/unlock button on the passenger door works,./..its just the window. what could this mean?

2) the seat belt sensors: the seat belt lights for the both the driver and passenger come light up/come on when i start the car but otherwise dont light up if someone's seat belt is off when the car is moving fast. is this normal? or is something wrong

3) i just got the car today, so im obviously still getting used to it. But the problem i encountered was i tried to start the car n held the key in the starting position for like a second n a half or 2. the engine turned, car turned on but stalled within 3 seconds. i tried it few times n had the same problem. but i noticed when i held the key down longer, the engine would stay on. is something starting to go wrong, or is this normal?

4) the car only came with one functioning key. the other is like a valet key which wont start the car. i called a few car shops, dealers n locksmiths n they said it would cost between $200 n $250 to get a new key done. (b/c it has the transponder chip). is there any way to get this cheaper. because im used to carrying a spare key on me or having one at home in case something went wrong.

5) the rear left speaker is busted. it rattles when you have the bass on mid or high. do i need to get it replaced or are there places that repair them.

6) my drivers leather seat is cracked and has a hole it in. what can i do to replace this.

7) the dashboard/panel light near the gear selector (automatic transmission) is barely there, and the red indicator that is supposed to move when you change gears is stuck in first. and volvo, unlike other car companies doesn't have anything on the instrument panel that tells you what gear you are in. any tips?

i know theres a lot of things to answer, but just tell me all that you know. thanks!