2004 ford Taurus SE 3.0 misfire problems?

My parents have a 2004 ford Taurus SE. 3.0 when you start it up in the morning it'll misfire like something fierce. After the idle drops. The car seems to run better. But while driving it it'll misfire at random. When going up a hill, or when you hit the gas hard, today 3/19/18 i drove it punched it down ran fine. I slowed the car down to 45 then after about a mile it started to misfire and smelt exhaust and gas fumes. I'm stuck i don't know what to do i changed the T.P.S. The ignition coil. The spark plugs. After i changed all of that i busted all of the insides out of the cat. Runs A LOT BETTER but still has that miss fire. And i'm not sure why below are a list of the codes that are on the car there 8 codes

p0174 too lean bank 2. (what is bank 2)

p0302 cylinder 2 misfire detected

p0303 cylinder 3 misfire detected.

p0316 engine misfire detected on stat up (first 1000) revolutions.

p0353 ignition coil C primary secondary circuit.

p0420 catalyst system efficiency below threshold bank 1 (what is bank one)

p0171 system to lean on bank 1.

p0300 random/multiple cylinder misfire detected

Speedometer needle shaking?

My speedometer needle has been wobbling around a lot. Any time I accelerate over about 60 mph it starts shaking. It's an older car, a 94 Ford Taurus. It has a new alternator, starter, battery, and battery cables.

What tools do I need to change my brake pads? Explain in plain English to a non-mechanic. Send pictures even?

Alright before I get into this, let me explain that I'm a 17 year old girl that has no one to do my brake pads, and I'm unable to transport my car to a shop. Recently bought a car that needs a brake pad change and decided it'd be a good learning experience to just do them myself. I've seen them done and also decided that if I **** something up that's my own problem. I have a 2005 Ford Taurus.
My e-mail is nyarseniccatnip@gmail.com (Haha. Ironic.)

2001 Ford Taurus No Heat?

I have a 2001 Ford Taurus SE with no heat? The tempature gauge in this car fluctuates between the middle and cold. It never stays in the middle like it should, it's always in-between the middle and cold. It will blow out very medium heat when I rev the engine up but it's not that hot, It usually stops doing this when I just let the car idle. I did have just the heater core flushed about three months ago. Can someone please tell me what could be wrong.