I was give up.

Today I lost my job. I was give up.
I spended my sense too much. (I'm assuming you meant that you overworked yourself in this line.)
So I was tired.
I'm very sad.

Hope you find a better job!

I Gave Up

Today, I lost my job. It made me want to give up.
I spent too much time thinking about it.
So I was tired.
I'm very sad. But I know that there will be a better job that I can 

work at soon. 

I gave up. =right way to say it in the past tense (Doesnt suit the situation really since you lost your job, better to say I feel down)

Today. I lost my jop(job). I was give up.  (Not a sentence you would use, but I gave up is the right way to say it, past tense of give rather than was + give).
I spended my sense too much. (I spend) (in English you usually dont use sense in this kind of sentence and its hard for me to guess what do you mean here)
So I was tied. (tired)
I'm very sad.

I think its because some sentences that are translated straight from Korean to English you get some little mistakes with word orderand conjugation, but if you keep trying you will improve definitely. Also for your work I'd like to say that it might feel hard, but for those that work hard nothing is impossible so rather than be sad try to make this your motivation to do better! 화이팅!!!

I was give up.

Today. I lost my (joB)I was give up.
I spended my sense too much.
So I was tied.
I'm very sad.