SN74LS06: RoHS what 10 　 substances (EU)2015/863 ?

Hello,
I do not understand your question.

If you need to know about TI's RoHS compliance, there are resources available here:
www.ti.com/.../lead-free.html

Additionally, in the section of the datasheet entitled "Packaging Information", there will be an "Eco Plan" column that lists which packages are RoHS compliant, as well as the materials used in the Leads.