Your mobility depends too much on your possession of a private vehicle. You may go for a car, motorcycle or truck as your own vehicle. But due to severe weather conditions in many regions it is not a good idea to depend on motorcycles all the time. It is also not a good idea to have a truck or SUV as they drink lot of gas and the maintenance is high. Somewhere in the middle and perfectly positioned vehicle for Desi would be a car. There are various types of cars to suite your need.
There are coupes which have capacity for 4 persons but only two big doors. Primarily these cars are designed keeping in view for two, driver and one passenger. The other model is the sedan which has capacity for 5 and has 4 doors. This can also be called a family car. Depending on the size of the car, they are categorized as Compact, Mid-sized and Full. Compact cars are very small in size and have a good mileage per gallon too. Some manufacturers even make two seated compact cars. The power of the compact car is also little less than the cars of other categories. There are other cars that have powerful engines and are rated as sports cars.
Now it is the time for you to decide the Make, Model and Type of your car. In US you will find hundreds of Make and Models (no Hind Motors/Maruti cars of course). From a Desi prospect I would say it is better to start with Honda/Toyota/Nissan. These Japanese car manufacturers know our requirement and never ditch us on the highways. The engines are good and prices are low. They run long enough before giving up. The life of a Honda/Toyota is considered to be 300K miles. But the look and interior designs are not at par with the American/European cars.
Used cars are good but not as new cars. They are much cheaper than the new cars, but at the cost of your peace of mind. You can buy used cars from either a private party or from any dealer. Here also you have to decide your budget and the make, model and year of the car that you need. Also the other main factor is the odometer reading.
The next best thing that you can do is to buy a used car from a dealer. It may not be as cheaper as buying from private party, but 100 times more reliable. Even some dealers give warranty on the used cars they sale. They buy the used cars, clean them up, do a thorough checking of the engine and repair any damages, dents etc before putting them on sale. You don't have to take the car to a mechanic for inspection, worry about the smog certification. But never forget to check the approximate price through KBB and have a CarFax report handy before making a deal with the dealer. Normally, good dealers don't keep cars for sale that have any major issues like bad accident history, salvaged title etc.
Go to the dealer, talk to the sales representative about your purpose. He/she will show you all the different used cars they have that fits your requirement as well as your budget. Once you have selected the model, make and color, go for a test drive (don't forget to check the odometer reading). If everything feels OK to you, then go to the dealers office and access their computer to logon to KBB for approximate pricing as well as to CarFax for accident/maintenance history for that car. Some dealers even do this for free. Now with all these things handy, start the bargain. You must always consider the worry free deal with the worth of the vehicle you are paying for. You may end up paying a little more than that of a private party deal, but there wont be any worries after you buy the car. If there will be any problem with the car (which is covered under warranty), you can always comeback to the dealer for having it fixed for free. The dealer may also arrange a loan for you and take care of the other formalities like title transfer etc. You will save a lot of time/worries in this. Time is important and costly in this country. So it is your call again.