Can I use my trade in car as a down payment?

I'm thinking of buying a 2012 Honda Civic. I currently own a 2007 Toyota that is fully paid off. I have decent credit but would like to trade in my Toyota. Can I use my trade in car as a down payment?

Is $9,400 a good deal for a 2008 Honda civic?

Is $9,400 a good deal for a 2008 Honda civic? - 1

Added (1). So it has 73,000 miles on it and it is a clean title. I don't buy cars very often so I don't know if this is a good price.

Added (2). Or would you guys recommend a brand new car?

I'm thinking if doing a project and want to know what would be best with an engine swap?

I was thinking of doing a project on a Honda civic, I have seen S2k builds and had decided that I might try to do that rather then the classic K series or B series build, sombly because of the fact I want to try and stand out. I was wondering which motor would be better, the JDM F20C, or the USDM F22C1? I had researched and the only difference I could find was displacement and torque differences. I just want to know what would respond better to mods?

Bad alternator or bad battery?

I have a 1998 Honda civic, a few weeks ago I replaced the battery in it, it was over 10 years old and always needed to be jumped. Okay so two weeks ago I replaced the alternator in it. It was bad also. Car drove great. Two days ago the battery light came on, but I just ignored it. (I know stupid) Car still drove ok though. Yesterday my gages were jumping everywhere but I still made it to where I needed to go. TODAY I started it, lights were super dim, but I made it about 5 miles down the road and it died. Jump started it, drove it about a mile, slowly lost power, gages jumping everywhere and eventually steering locked up and car died again. Tested the battery it tested at 11 Volts so I left it on the side road. I'm a woman, not car savy and don't want to get ripped off, I have bought an alternator before for another car and it did this, went bad, gages were jumping everywhere and car would barely shift. Replaced the alternator, problem solved. That one however never left me on the side of the road. Any pointers would be great.

Why is my car overheating? - 2

Back in June, my 2002 Honda Civic began to overheat every day. Repair shop put a new thermostat in and it ran perfectly. Problem solved! Or so I thought. It ran fine for about 6-8 weeks. Then it started overheating again out of nowhere. Another new thermostat was put in, thinking the old one may have been defective. My car ran fine for another 6 weeks or so and then it started to overheat again out of the blue. What the heck? Repair shop is puzzled.