I'm not sure what parts are available where you live, where you would buy from, or what the pricing is like there, so all I can do is give a rough idea.
Your requirements are fairly modest so there's no need to go crazy with hardware, but having upgrade options available is always a good thing.
What I would recommend is something like:
AMD Athlon II X2 240/245/250 CPU - a nice dual core processor, very cheap with unbeatable performance for the price. Future upgrades are nice and easy, but if you want more multitasking performance grab an Athlon II X4 620/630/635 instead.
Asus M4A785TD-V Evo - probably overkill for the board, but a good solid model, lots of features and good upgrade options. Decent onboard graphics.
4GB of DDR3 RAM - good rbands include Kingston, Corsair, Crucial, G.Skill, Geil, and probably more. Speed and latency don't have a big impact on performance so don't worry about those.
Corsair CX400W PSU - a very good PSU.
Antec 300 case - again, probably overkill, but it's a good solid case, nice and roomy inside, lots of drive bays and good cooling. Usually available at a good price.
Seagate Barracuda 7200.12, Samsung Spinpoint F3 or Western Digital Blue/AAKS HDD - all three are great drives. Available in a range of sizes, best to get more than you think you may need.
Pretty much any DVD drive, I like Lite-On drives but others have their own preferences, I've used a lot of brands with no isses.
I don't think I have forgotten anything, but if I have then do feel free to slap me upside the head.
I hope this goes some way towards helping you out, as I say it's very general as I'm really unsure of pricing and availability over there.
Feel free to ask any questions you may have about the choices I picked, or indeed any alternatives you're interested in.