I just bought a 2005 Ford Focus?

I just bought a 2005 ford focus ZX4 ST yesterday for my first car. I really like the car but I have a few questions. It has the Sony audiophile package so it has a subwoofer in the trunk but the subwoofer isn't working. Is there some way to turn it off and on? Also it looks like there's some way to adjust the height of the driver seat manually but I can't figure it out? Any held would be appreciated.

What type of cars to look at?

Budget: $16,000
Needs: reliable, automatic transmission, 20+ city mpg
Really want: luxurious, fast, leather seats, bluetooth, USB input, year 2007 or newer
Needs to be a Sedan, SUV, Truck, Wagon, or Hatchback. Also, I will be using it in the snow and for driving to college and back. I can't have a small vehicle like a Nissan Versa or a Ford Focus.

Volvo C30 Vs Ford Focus as first car?

It's either a pre owned 2013 Volvo C30 or a new Ford Focus. I like the volvos look but I can get a new focus for similar money. Should I get the focus and pay the large bit of the depreciation? Or the used volvo which has already had that loss taken off?

Car noise diagnosis, input please?

Sometimes when making a hard right turn, when the wheel returns to center it makes a rubbing/ grind sound. I'm thinking cv shaft ( don't know if left or right side) no clicking noise like a regular bad cv joint. Inner or outter tie rod end or a wheel bearing. The sound is like a steam boats horn if that helps at all. After a hard right turn after the wheels are straightened it makes the noise. Car is a 2005 ford focus st. Ty in advance