Springs will vary from $250 to $400 but you can find them for less here and there.

Struts will be around (rough guesstimate) $300 for Tokico Blues (non adjustable) to as hogh as you want to go and again it can be found for ess aross the web...KYB adjustables are an excellent deal for the money.

Strut bars wil run on average $300 for both front and rear.

sway bars I am not sure on.

another thing that will improve the handling is a wider contact tire. Most people go to 17" rims because the contact patch is greater which means you get more overall traction because it touches the ground over a larger surface area from both the front to back of the tire as well as the average width being 7.5" which gives you lateral contact.