Graphics Card & Processor Upgrade

Hello,

I am looking to upgrade my graphics card and processor to enhance my performance and graphics. I am completely new to this sort of thing, and I'm not quite sure what an upgrade for me would be. My computer's graphics and processor's specs are as follows:

Graphics:

AMD Radeon HD 7540D
Memory 512 MB
Driver version 12.102.1.1000
OpenGL
Version 4.2.12198 Compatibility Profile Context 12.102.1.1000
Vendor ATI Technologies Inc.
Renderer AMD Radeon HD 7540D
GLU Version 1.2.2.0 Microsoft Corporation


CPU:

AMD A6-5400K
Cores 2
Threads 2
Name AMD A6-5400K
Code Name Trinity
Package Socket FM2 (904)
Technology 32nm
Specification AMD A6-5400K APU with Radeon HD Graphics
Family F
Extended Family 15
Model 0
Extended Model 10
Stepping 1
Revision TN-A1
Instructions MMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, AMD 64
Virtualization Supported, Disabled
Hyperthreading Not supported
Fan Speed 2446 RPM
Bus Speed 99.8 MHz
Rated Bus Speed 99.8 MHz
Stock Core Speed 3600 MHz
Stock Bus Speed 200 MHz


Also, I have an HP Pavilion p6-2330 with 6GB of RAM. I am looking to increase my computer's performance and graphics without spending a fortune. Any advice is greatly appreciated.