[SalesForce] How to get standardPriceBook id in Test class

Yes you should remove seeAllData=true and never use it again (Isolation of Test Data in Unit Tests). Instead create a test data directly in your test class and work only with that data. You have to assume that there is no data you can access in the production org.

Common Test Utility Classes for Test Data Creation.

In addition your code should respect system limits. Use Limits Class to access limits dynamically in apex.

You can use Test.getStandardPricebookId() method to get the standard pricebook Id in test class. In this way, you don't need to perform any soql or write seealldata=true.

Please let me know if this makes sense.