Hi user_4442131,
For Q1, All the features mentioned above do not require licenses.
For Q2, Does an SVI refer to a VLANIF interface? If yes, the maximum number of VLANIF interfaces is 4063. VLANIF interfaces, Layer 3 sub-interfaces, Layer 3 main interfaces, BDIF interfaces, and tunnel interfaces share interface resources.
For Q3, No special license needs to be updated every year. The validity period of the purchased license is as long as the license expires. If the license expires, you need to purchase a new one.