This is a US based site run by Tower Hobbies and it has some good info.
A "ready to fly" trainer (examples; Tower Trainer 40 RTF, Superstar Select, Avistar Select) package that includes plane, engine, radio is a good starting point. These typically only take an hour, plus charging batteries overnight, to get ready after you take them out of the box.
The RTF (ready to fly) trainers sold by Tower use Futaba or Tower (rebadged Futaba) radios.
Listing of all Hobbico RTFs, including electric aircraft.
Tower Trainer RTF
This link is to Horizon Hobby, two trainer packages they sell. These use a JR radio,
Most of the RTF setups cost $270 to $350 in the US. In addition to the plane/engine/radio, you need glow fuel, fuel pump, glow plug ignitor, electric starter or 'chicken stick', and some basic hand tools. If you choose electric aircraft rather than glow fuel powered ones, the additional equipment needed will be different.
Many of the planes linked from the web sites above have the manuals online so you can see what's involved in the assembly and exactly what additional equipment is needed.
If there is a flying field or club in your area, you should visit it and find out what trainers and radios are popular there. If you will have an instructor, this is highly recommended, be sure what you choose is compatible with his/her equipment. Once you decide what you want, check local and mail order pricing. You might even find a good used setup for a decent price. Knowing the price of new stuff will help prevent overpaying for used stuff.
I'm seriously considering to spend some time with radio control airplanes. I've been really impressed with what I've seen in Motors cable tv-channel, it's amazing. My question is: what's the best way to start? How much money will it cost? Thanks in advance,