Should I replace my car battery?

Should I replace my car battery? - 1

Added (1). I have a 2007 Ford Five Hundred. It hasn't been used much over the holiday period - it was probably last driven on 12/23. Not sure how old the battery is but I don't think it's been replaced for at least 3 years.

Added (2). When I tried to start it this morning, it make a fast clack-clack-clack-clack sound and wouldn't start. Now it's not even making the clacking sound. I tested the battery with a multimeter. It came up with a reading of 10V the first time. I tried it again half an hour later and got 8V. That time, I also tried turning on the headlights to see if that would move the needle at all. I think it did but it wasn't significant. Should i replace it?

Did GM shim starters from the factory?

If they didn't shim starters from the factory which I've never seen this then why do new starters need to be shimmed? Ford and mopar starters do not the shims.

Shoukd i worl for a ford or acura dealership?

I'm being offered a job as a lube team in an acura dealership getting pay 11$ an hour.

I'm being offered to work in a ford dealership as flat rate pay(meaning getting pay by the jobs i do) getting pay 16$ an hour but on flat rate.

I have worked as a techs helper for 1 year and a half.

I have a child with hearing loss and development delay.

What would be a better job for me?

Thinking about buying a truck?

For starters, the truck is a ford sports trac. I don't know why I've always liked how the sports trac look. Test drove the truck already! Needs a bit of work but for the most part runs good. Now is there anything I should watch for in the ford sports trac? I hardly see some driving around. Now I'm wondering Why? I don't want to get a truck that ends up giving me way more for what I've asked for lol. Did you guys ever bought a ford sports trac? If so! What's you experience?