<p>got a new blog at wordpress few days ago (<a href="http://ghads.wordpress.com" rel="noreferrer">http://ghads.wordpress.com</a>) and I want to post some code snippets now or then. Is there anyway to make it look like code without paying for extra plugins?</p>

See here:
http://en.support.wordpress.com/code/posting-source-code/
Wrap your code in these tags: [sourcecode language='css'] .. [/sourcecode]
(or shorter [code lang='css'] .. [/code] )
Note that Visual Editor doesn't interpret the tags, you need to click Preview to see how it works.
Available language codes:
actionscript3
bash
clojure
coldfusion
cpp
csharp
css
delphi
erlang
fsharp
diff
groovy
html
javascript
java
javafx
matlab (keywords only)
objc
perl
php
text
powershell
python
r
ruby
scala
sql
vb
xml
Hope that helps.