Problem with running WordPress

I installed wordpress and everything seemed all right. Then I wanted to write article, but I could´t because the font of text is white, so it´s impossible as the backrground is the same color. Next problem is, when I click on pictures that upload things, nothing happens. I can upload the pictures and stuff in Media part, but I can´t do anything wtih them, I just see their URL nothing more. Next problem is, I can´t add widgets. I come to widget part, but I can´t do anything with the plugins.