You can enter these items as assets regardless of if they were new or not. You simply won't check the box that states you bought this item new.
To enter these assets:
Go to the Business tab
Go to Business Income and Expenses
Select I'll choose what I work on
Click Update on the line for Profit or Loss from Business
Click Edit on the line for your business
Click Start/Update on the line for Assets Being Depreciated
If you already have assets listed click on the Add an Asset to enter in the information regarding your equipment. Otherwise, you will follow the interview to begin entering this information
On the page Tell Us About This Asset you will see options, one being I purchased this asset new. This is find to leave unchecked
Follow the prompts to finish the interview. You will be returned to the Business Asset Summary page where you can add additional assets