2004 Ford Escape. AC blower motor replaced, but now getting no air flow.?

Yesterday my AC stopped coming on. I turned the knob but couldn't hear anything working, and I was getting no air flow. I replaced the blower motor, using the same fan from the previous motor, and now I can hear the motor running perfectly, but i'm getting VERY little air flow. The air i'm getting is cold, but it's hardly anything. I checked the filter, and that's good. I'm unfamiliar with all of this, and the only paperwork in the box with the blower motor mentioned that motors can turn is different directions, and how to see which was the fan turned. There was very little information as to whether this was something I was supposed to do, or if it was just information, since there were no actual instructions. I read online that it could be the "blower doors?" not opening, but i'm unsure how to check this. The only door I saw was behind the glove box, and I don't know if that's the door being mentioned. Any assistance here is appreciated. Thank you.

Can you remove the lens from a 2004 impala headlight?

I have an 04 impala. I am trying to paint the interior of the headlight to match the car. I have done this before using the bake method to warm up the glue. This allowed me to remove the lens fairly easy. The impala headlight seems different. I can't seem to see where the lens comes apart. I Googled this and haven't found too many answers. Has anyone does this on these headlights?

I went to the dealer to have a part installed to my car and after the work was done I found out

1. he put a part on that did not come in the box and charged me for it

2. if I take it back to the dealer and get the factory part put back on can I get my money back

I know my engine is toast. Should I just replace the engine or get a different car?

I have a 2003 Toyota Corolla CE with 162000 miles and a broken engine. I was told earlier today that my head gasket is leaking, which has happened twice before already along with some other issues with intake valves and carbon buildup. I don't plan on having the engine repaired again since (being naive) I've already gone through 1700 dollars worth of repairs since I got the car over a year ago and the problem will just come back anyway.
So I'm left with two choices then: pay 2800 for a replacement engine, or buy a 2-3 thousand dollar used car once I have the money for it. My current car is in decent shape other than the ruined engine and would probably be worth about 3-4 thousand dollars if I get a new engine, but the fact that I've put a TON of money into it already with no improvement, AND the fact that I'm not very fond of it anymore for pretty good reasons may warrant a new car. However, all I could get is at most a 3000 dollar car, so whatever car I get WILL have problems of some kind or another so I don't know what to do at this point. The car is driveable right now but it will eventually become worse and die completely so I gotta do something about it soon. Any ideas?