Today

Today is my may friend's birthday, and we went to have a meal hours ago. Then I went to buy a mouse and a headset, because my old one was broken broke. After that, I bought a hot-water bag for the weather was cold.Finally I bought a gift to for my friend, she was very happy.
Though I used much money today, I was happy.


Very good job, almost perfect!  There are hardly any mistakes but there are some things you can change to make it sound more "native":

Today is my friends birthday and, a few hours ago, we went out to eat. After eating I went to buy a mouse and a headset because my old one was broken.  After that I bought a hot water bottle* because the weather is cold.  Finally I bought a gift for my friend.  She was very happy.  Even though I spent a lot of money today, I am happy.

*we call it a bottle even though it's a bag.  The bottle you drink hot water from is called a "thermos".