Your laptop is obviously obsolete. The only rational decision to make now is to buy a new one, however it can be costly and most laptops have a lifespan of two to three years where their components become outdated and it becomes a burden to use.
Although I found
this great PC build where you're able to play Battlefield 4 on ultra settings at 1080p at 60fps. It also includes playing a multitude of AAA titles on 1080p without the frame rate dropping below 30fps and it costs no less than $900.
In a nutshell, this PC build gives a benchmark score of 3200 - 3400 on 3D Mark Fire Strike. Ironically most laptops give a score of no less than 2000 or 2500 whilst they cost more than this build.
I'd strongly reccomend you to spend your money on this build than a laptop.