These are some really low level specs. You'll manage some of those games on low settings, but even then, you may face some lag. You need higher settings for assassin's creed to work smoothly, that's for sure.
Yes, you will be able to play both MUA and JLH with your ATI Radeon HD 2400 Pro. But don't expect great performance and graphics. The specs of the card just about meet the spec requirements for the game. I think you should try to arrange a more recent graphics card. Good Luck
Hahaha. We've all been there, buddy. Just hang in there. Look, as I said before, you will be able to play those games on low settings, but work on saving for a graphics card upgrade so that you don't have to play on low again. Since you don't have much of a choice, there's not much left to say