Purchase of Persona Questions

Hello All - hoping that this posting finds you well.

Newbie here - I recently bought Second Hand Prius Persona.

Firstly love the car - seats are awesome due to firmness ( hope they stay that way in 5 years time ) and fuel economy ( need we say more).

Few questions

1) Does anyone know of any company that replaces the cracked screen ( model 57032) otherwise I have a spare display gathering dust ?

2) I spend a lot of time up north and was wondering if anyone could recommend a good winter tire brand and associated steel radials - I gather that TPM has to be installed on them - correct ?

3) How can I get the software updated on the MFD - is this a service that needs to be performed by the dealership ?

4) Finally , yeah the sound system is kinda painful - can anyone recommend a reasonable upgrade plan/ solution to improve the speakers / sound quality generally

Regards and thanks in advance
Richard