How do I highlight a text from Word or Safari?/ dragging items.

I have a Macbook Pro, bought in 2009. Normally, I would be able to use the track pad to highlight, copy and paste an item, but I have not been able to highlight anything with the trackpad. I am still able to double tap a phrase, highlight a selected phrase, and then copy and paste the phrase. I also just found out that I am able to double tap where the courser is located, double tap, and select a phrase I want to copy and paste, but I would still like to use the Track pad.

In addition, I have not been able to drag and drop items to different folders, along with having two separate windows open and dragging and dropping items. I have recently enabled the "Dragging" and "Drag lock" options, but can only drag and drop items, not folders.

How would I fix this problem or would I have to take it into the Apple Store? I would like to avoid the latter, but it might be inevitable. Thank you!