How to reprogram my car fob?

We loaned our van to a "friend," who brought it back without the fob attached to the keychain. She claims she doesn't know what happened to it, but it's unnerving to think that someone out there might have access to our van, whether it's her or someone else.

Is there a way to reprogram the whole system so that the old fob will no longer work on the van? I know that the remotes can be programmed.

It's a 2006 Honda Odyssey.

How much should I pay to replace the AC compressor on a 2010 Honda Odyssey?

The air conditioning on my wife's minivan recently went out. I had her take it to a mechanic expecting a refill situations costing less than $100. When they got back to us they said the clutch would not engage on the AC and it required replacement costing over 1100 dollars. I've seen the part online for $250 to 450.

How much is reasonable to pay for this repair? Would I be better off buying the part online and having someone else install it? I'm told the job is about 3 hours.

Why does the screen on my honda odyssey go dark?

I have a honda odyssey 2005 and I notice the DVD screen will go dim at random times how can I fix this? Ps it seems to happen when it rains and stuff if it's automatic is there a way to override it?

Advice with buying a used Acura?

I currently own a 2001 Honda Odyssey and am very happy with it. I'm looking at either a 2010 Acura MDX with 31,000 miles for $28000 or a 2011 MDX with 25,000 miles for $31000. I prefer the colors of the 2010, and it comes with the Technology packages. However, the 2011 is, obviously, newer and has less mileage, and I'm not going to not buy a better car just because of its looks. This is my first time buying a car by myself as well as my first time buying a used car. How important is 5000mi difference? Or, is 25000 miles too much and I should just look for a different car?
Also, any other advice is welcome! Thanks!

Added (1). I'm buying another car because I need two cars. And who knows how much longer a 13 year old car is going to last?

Updating my 1995 Honda Odyssey and 1993 Honda Accord Wagon: Is this possible?

Honda Odyssey: I need to buy a middle or 2nd row of seats that has 3 seats and seatbelts in it as well as a seatbelt for the 3rd row. The 2008+ models all seem ot have 3 seats in teh middle and rear rows, so if I buy one of those seats and install it in my Odyssey, boom, my Odyssey becomes able to seat as many as a Honda Pilot could.

I also need to buy two rear-facing seats to install in my 1993 Honda Accord Wagon. This would update the Wagon to be able to safely seat 7 people, granted the two rear-facing seats would be for people with weight under 60 lbs.

When did the Honda Odyssey model get a third seat in the mid and rear rows?

I think it was 2011 but I'm not sure. I'm going to goto a junk yard, remove the three seat rows and install them in my 1993 Honda Wagon and my 1995 Honda Odyssey.

http://www.newcars.com/honda/odyssey/2011
http://www.autotrader.com/research/article/car-reviews/197705/2013-honda-odyssey-new-car-review.jsp

Added (1). NEW PLAN: Buy middle seat for 2nd row and additional seatbelt for third row.

2007 Honda Odyssey tail light replacement?

So, I bumped into the mailbox last night by backing out of the driveway in way too much of a hurry, and cracked the driver side OUTER tail light. Oops.
So I go online to start looking for a replacement, because no way I'm going to the dealership to pay their prices. The problem is, I see an extremely wide range of prices for the same piece. Some tail light assemblies do not include a wiring harness. Others note that they still have "housing left on body".
All the lights and indicators still work, I just merely broke the reflective red and clear lens. Can I buy the cheapest part I can find? (Without wiring harness)
Thanks!
2007 Honda Odyssey EX, driver side, outer tail light.

Aerodynamic clutch kit for a Honda Odyssey?

Hi! Our Odyssey van has been lately using a lot of gas. It gets about twelve miles to the gallon. I took it to my neighborhood mechanic who found out that it was because the transmission gear clutch was slipping. He recommended that we should get an aerodynamic clutch kit and that he could have one installed for $1,500 parts and labor. The price seems kind of steep so I was wondering if I could find one for cheaper and have him install it for me. I haven't been able to find one for a 2006 Honda Odyssey. Could anyone guide me?