For all inkjet printers it is recommended that you use the printer at least once every 3 days or else there is a chance of the ink in the ink tubes drying up,  leading to clogging of the ink tube. Once this occurs you will have to head clean the printer(which is an option in printer maintenance) so that the ink can circulate properly through the ink tubes. This leads to some ink wastage, so it is recommended that you take at least 1 print every 3 days.

For this model the recommended printing volume is 100 pages/day. If you have higher printing requirements look at the higher end models. If you any confusion regarding choosing the appropriate printers you can look at this post to get more of an understanding : Epson Colour Printers

1 bottle of black ink can print up to 2000 pages*

each bottle of colour ink can print up to 1000 pages (3000 pages combined)*

* the above mentioned number is only accurate when taking a print with only text. When you include images in your print it becomes difficult to estimate the number of prints as the ink usage also depends on the complexity of the image.

If you have any problems with the printer

first note down the printer serial number: it is a 10 digit number that is found in your printer box and also on your printer. it is given between * * symbols.

next contact Epson customer care: 18004250011 to explain your problem

if you still have the warranty for printer the service is free

if out of warranty the service in charge will contact you to explain the service charges for the repair.

Yes you can any paper within 70-256gsm. But is is recommended that you do not use photo paper(256gsm) often. This is generally a document printer and not a photo printer. if you continue to use this printer with photo quality papers there will be problems with the paper pickup wheel of the printer.

If you have to take prints with photo paper sometimes it is not an issue but do not use this printer to take large volumes of  prints in photo paper.

if you need to take photo quality prints you can look at Epson Photo Printers for more options.