You can change the size of the fonts in Metro XL.
Yes, Samsung Metro XL does support the Tamil language.
No. You cannot use whatsapp in Samsung Metro XL.
You can store up to 1000 contacts in Metro XL. In addition, you can store up to 250 contacts in each of your sim card. So, if you are using 2 sim cards, in total you can store up to 1500 contacts.
Yes, Samsung Metro XL supports the Gujarati language.