The best place to buy RC planes is nitroplanes.com, they have great sales around the holidays!
harbor freight tools
you can buy them in hobby shops
There are several places to buy discount RC plane parts. On www.rchobbyexplosion.com for example, you can buy a Megatech Mega Nitor 2 Deluxe Glow Plug Starter for $24.95 which saves you $15. Another good place is www.ebay.com where you can bid on items, potentially saving quite a bit of money.
In your dreams
Yes there is a specific fuel needed to fly a RC Plane. This fuel is: Rapicon Max Power RC Airplane Fuel 15% You can buy it here: www.amainhobbies.com
Both RC plane are awsome because they are both planes.
You can buy inexpensive rc airplane batteries online at www.all-battery.com/rcairplanebatteries.aspx. This is a great store to find all cheap batteries online.
Cars Direct is the best place to buy quiet cheap cars. True Car and Clark Smart are the other places you can get a car for the cheap.
There are many places on the internet that you may purchase RC lip batteries. A few websites are www.maxamps.com/, www.cheapbatterypacks.com/, and www.rclipos.com/.
To buy a cheap electric remote control buggy in Australia, you may want to look in the used advertisments in the paper. It would be cheaper than buying it new from a hobby shop.
If it is an electric RC plane then all you will need to pay for is the plane and if you plan on crashing a lot some spare propellers if it is an RTF or ready to fly version. If it is an ARF or almost ready to fly you will have to buy a motor too.
Generally yes. Most RC helicopters have different servo frequencies programmed in to avoid this problem. It is recommended to buy mid- and higher-end RC helos that have programmable frequencies, so you can set them yourself. But if you are going to buy a three channel RC helo, your best bet is to buy two different models, or one brand that has interchangable frequency chips.