Parking in Seville

Hi All,

I am planning a roadtrip in South Spain this Christmas and have a car booked from 20 Dec to 1-Jan. I have been scouting for parking around the airbnbs in Malaga and Seville. I can see a number of underground parking spots which is great. I have a question regarding how payments for these are made

1. Can i get a ticket while entering and the total payment is taken when leaving the lot?
2. Or do I need to pay via apps. If so, can you please let me know what parking apps I need to download and setup before arriving at Spain.
3. If I pre-pay for 3 day parking in a spot, am I allowed to enter and exit as needed or will I have to pay again while re-entering