For the white pine, work based on the assumption that no buds will come on the lower trunk. I have one to play with in the yard and I do not see strong bud formation, and overall, weak growth. Have a look here for an anectdote by a well-versed British bonsai grower:
bonsai4me.com/AdvTech/ATJapaneseWhitePine.htm
For your spruce, I would enture a guess that this is picea abies. Often used, rarely seen as good bonsai because of trouble in setting the branches (They stay flexible for a long time) and are reluctant to back-bud. Also, sensitive to hot roots, I understand. All reasons together too much of a belladonna for my yard, which is why I have not tried the species yet. Once again, a reliable place to get some of the basics from:
www.bonsai4me.com/AdvTech/ATPiceaPruningstylingandwiring.htm
Keen in mind, the author is based in the UK. Typically humid cool summers and humid reasonably warm winters.