Should i upgrade my 2009 macbookpro components on general way? I've a MacBook Pro (mid 2009), and it has low performance. If I can should I upgrade the memory` and/or a new hard drive or SSD? I don't want to buy another one if my Mac is in perfect condition. 

My budget for a upgrade is between 300€ and 400€, depending on components suggested.
The most important upgrade is making the system drive a Solid State Drive (SSD). This alone may double the effective speed of your computer. Extra RAM is a nice second.

Since SSDs are usually more expensive than traditional hard drives per GB, you could explore a 'hybrid' drive, though I'd recommend the fastest SSD that your Mac's PCI bus throughput can handle. 

When I upgraded my old MacBook Pro (I think it was also a 2009 model), large SSDs were still expensive, so I bought a 128MB SSD for the main system drive and moved the existing HDD into the spot where the Optical Drive was (with a special mounting bracket), and put the Optical Drive in a cheap external USB case. 

I found all the parts on eBay for under $250USD and was honestly shocked at how much faster that MacBook performed.