http://www.howstuffworks.com/hybrid-car.htm is a website which offers a comprehensive explanation of how hybrid vehicles work. The site is well organized, and contains a myriad of photos and diagrams to help explain difficult concepts.
The following article I am including is primarily directed to the question at hand. It is devoted to hybrid vehicles and how they work. The article can be found at http://vehicle.ezinemark.com/hybrid-cars-what-makes-them-work-31f0047eca4.html
There are currently no diesel hybrid cars that are made, but most manufacturers make hybrid cars. I would contact someone at the dealership. They should be able to assist you, or at least point you in the right direction.
There are some websites that list which hybrid cars are available, and include descriptions of which producers provide them. The most reliable website you'd be able to access is www.hybridcars.com/hybrid-cars-list.com. There you would be able to find a comparative list of all hybrid cars currently on the market.
Hyundai is a really good company for hybrid cars. Hybrid cars are gaining popularity and there are more options in todays market. You can always find an older model or used car for under $20,000.
You should try this website:www.edmunds.com. They offer maintenance on hybrid cars. If this website doesn't work out for you, you could call around to some car dealerships and see if they offer hybrid maintenance.
Yes, the saturn hybrid cars are very fuel economy and environmentally cars. On www.fueleconomy.gov you will find very good information on comparing the fuel for different vicheals.
There has been a huge spike of interest in the field of hybrid cars lately, and this has led to a number of people trying to find used hybrid cars to help save a little money. The reality is that these cars are difficult to find used on most traditional car lots since they are so new, but they can be commonly found online or through a private seller.
To find a good website to compare cars would be www.fueleconomy.gov. It gives you alot of detail on hybrid cars even how much it cost to fill up the tank and how many miles per hour.
The future of hybrid cars can be found on many websites for automobile companies themselves. For the ideal future hybrid car, you can read President Obama's statements on where the hybrid car should be in the next decade.
You can compare various hybrid cars from all different car companies online. This will give you an idea of the different types of hybrid available. When ready to purchase a hybrid, find the nearest dealership for that brand of car closest to you. You can find them online or in a phone book.
For questions, I would find a dealership nearest you and ask for assistance. They should be able to point you in the right direction. Most manufacturers are making hybrid cars now.
I would reccomend either a used car dealership or if you are looking online edmunds.com is a good website to find the best used hybrid cars available for cheap.