when i download a theme the font is so small i can barley read it where do i go to, to make the font bigger so i can even read the damn text

Look in the theme's directory, often times there is a subdir called "misc" which includes a font file that you have to install. You should also read the themes' readmes, usually they will explain such things.

How would i exactly install it i just had it working... for some reason lol i dont know how but now its not where do i put that file?

Alright i installed well tell me how too install still because i still not getting it i think i did it right except when i right click to go to the menu that menu is still small how can i make it bigger? like the font on my taskbar