Is getting a car on finance a good idea?

I'm looking into getting a 1.4 or 1.6 Ford Focus on finance but I'm wondering whether it's a good idea or not so. I reckon I could afford it but I'm just looking for

Should I keep the truck or get a car?

My girlfriend is pregnant so I'm debating on gettins a car to save gas…

Here is what I have:
2005 Dodge Ram 1500 Quad Cab Laramie 4x4 5.7L
-2 Subs and amp
-Custom Exhaust
-CAI
-74k miles

-Has a sunroof leak
-it needs something more than an adjustment, but steers itself to the left
-steering wheel leather is starting to get all rough and peely like
-starting to acquire scratches, numerous just by age

-I owe 14k
-$360 a month

Here is what I'm debating on:
2013/14 chevy cruze - loaded -$25kish
2013/14 ford focus titanium - 25kish
2013/14 caddy ATS - 30kish

Any better options? Or just stick with the truck pay it off go about my day? I'm not struggling financially, i'm military but i don't know.

Oil pressure warning light?

I have a 2003 Ford Focus 1.6 petrol. I have noticed that after I turn off the engine and then turn the ignition back on the oil pressure warning doesn't not come on immediately like the other lights such as the battery red light. It takes a few seconds before it comes on. The oil level is ok. Why is this?

What happens to new cars when they don't sale?

We'll take (for example) an 2013 Ford Focus. Ususally, the factories make a certain amount then its up to dealerships to ask for a certain # or will get a certain # due to many various factors but what would happen if there are a few+ left over? Yea, they could get shipped to another dealership that needs volume but what if there's a car or 3 or whatever is left over?

What happens to new cars when they don't sale? Where do they go?