while i am playing one player i do not know how to be able to make mor people once i have reacshed the pop limit

You can't. Not unless you have a chance to change your custom civ and have a larger pop cap by buying that option with your civ points. Otherwise, the pop cap is as high as you go.

to make ur pop limit higher choose +5 pop cap in the civ points menu and make a colisieum u think each time u make one it raises ur pop limit by 20 and also look around for idle cits or something u dont need that is taking up pop cap room. hope it helps

just make a Coliseum.. and take that +5 pop when u chose Ur civilization then u can get much more citz and army's

Actually, the civ builder menu offers +15% pop cap, not just +5 pop. Additionally, there are four technologies available in the hospital that allow +5 pop for each. Finally, the coliseum doesn't change your pop by a fixed amount, it redistributes it: 20% pop cap is taken from your enemies, and you receive 20% extra.

You may also be interested to know that the cost of the coliseum, like all other wonders, increases when you advance every few ages (just like towers become more expensive, going from 175 stone to 210 stone).

Other than that, you're stuck with your pop limit. Hope this helps.