I bought a teak dining table (with a veneered top) and chairs from a
second-hand shop. They're Danish, about 50 or 60 years old.

What would you recommend for wood care?

I have at my disposal right now boiled linseed oil and white spirit, and
I expect a thinned solution of the linseed oil will be OK - but would
something marketed as Danish oil or teak oil do better?

Daniele