CAn I run GTA 4

http://www.systemrequirementslab.com/cyri/

Allow the install of their program (it's safe and light)

From there you can choose whichever game you would like and see how your PC stacks up.

Ten

Quite a few of these can i run threads..
Well as Ten suggested sys requirements lab will do provide your answer.
Which is no,Maybe some little fps on the lowest settings. - The gpu is too low end, and a quad core is really recommended.

Possibly with very low settings.

the gfx will handle it just but the cpu wont.
your fps will be about 15 or lower as its probably the most cpu intensive game i have ever come across and really needs a 2.4 quad to play smoothly at anything over minimum.