The ps command is probably more suited to what you seem to be trying to do.
Try 'ps aux' at prompt without the quotes.
'man ps' for more info
However, if you're set on using top here is how to send output to a file-

top -bn 1 > top.txt

b= batch mode
n 1 = number of iterations to output to file
top.txt= file for top to send output to.

HTH

Thanks for these.
I will try it.

And I am running Linux MINT, but was running Ubuntu when I asked this... HOWEVER it is STILL relevant now.

Thanks again.