Deadbolts and Keyed Entry

get a kwikset smartkey lock. basically allows you to rekey to whatever key you want so all your locks can work with the same key

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get a kwikset smartkey lock.

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That was going to be my rec too. Depends on the locks and handles but might be just as cheap as using a locksmith

I brought a loose deadbolt a couple years ago and had them key to an existing key. Think it was like $25. Other posters are correct Lowes/HD will rekey for you for free if you buy there.

I did mine myself. It's really simple and I felt like James Bond while doing it. Just a matter of taking the cover off the lock pins and dropping the correct length pins in each hole.

I've always used Alford Safe & Lock. It looks like a place that time forgot on the inside, but they are good to deal with. I usually bring them my locks, but they will come out to you. Just a note... keyed doorknobs are useless. Just put a regular passage knob on the doors so it's one less lock you have to re-key. Keyed doorknobs are the reason everyone locks themselves out of their house.

I replaced my deadbolts with keyless electronic keypad type. Have had them for 3-4 years., They great, no worries about having keys, you can program temporary codes if someone needs one time access to the house. Very easy to install,

Kwikset has a code number on the back of the packaging. Match them up and the keys/locks are identical.

But SmartKey is the way to go.

You can buy sets of deadbolts and keyed entry doorknobs that are keyed alike at any big box store.
When we built our house back in 2004 we bought a set for 5 doors.
1 key for the all the deadbolts, 1 key for all the entry knobs.