As
@Lucid says likely the pair of cables were for a Sky + or HD box, until Sky Q every Sky box that could record used twin cables one for live viewing and one for recording, and had a coax output that could work a remote TV with a eye so the sky remote would also work in other rooms. With a 14" TV the analogue signal was ample, but as we went up in TV sizes the picture was not good enough to use on 32" TV's. I bought cheap free to air (not freesat) boxes and the dish had 4 outputs, two when to Sky box, and one to each bedroom, but to get more than 3 TV's to work was a problem.
When I moved we transferred Sky and we got a upgrade to Sky Q, the LNB on the dish has 6 outputs, 2 special for Sky Q and 4 for the cheap freesat boxes, we got three boxes with Sky Q so all three use the same twin special connection to the LNB and the two satellite boxes wireless connect to main box, I don't know the limit, but know can watch three programs and record one all at the same time.
Main reason for Sky was in mothers old house we had Sky and when she died the contract was auto finished and what ever the probate people did it seems there was a problem with the telephone line and numbers, thinking we could get cheaper we went for talk talk, that resulted in no telephone for 3 weeks while we were trying to sort it out, we then tried the post office, and telephone connected, however when we moved out again problems with charges for a phone we did not have, and the broad band was rubbish, however Sky broadband in same house had been excellent, so fed up with fighting to get good broadband this house with transferred Sky from last house, and they arrived and set up everything, phones, broadband and TV no hassle. Including a hybrid LNB so free to air boxes also work.
In my case the house is mine not rented, but it seems the Landlord does not need to provide aerials or dishes, clearly as in some areas there is no terrestrial TV reception then it can hardly be made law for Landlord to provide an aerial, although many do, you however would need to ask, the landlord may provide one, but it also may be that there is no signal or poor signal or like in my case the local repeater does not transmit all freeview channels so everyone uses satellite.
@Lucid has also helped me find a way to listen to radio without any good radio reception using satellite, I would have preferred to have used FM but signal is just not good enough, LW clearly works as my weather station has auto corrected time to Europe time from a time signal from Germany, yet can't get Radio 4 FM.
You have not said were you live, you will note both myself and
@Lucid show our location. We all tend to think everyone lives where we do, and has the same facilities, but that is clearly not true, because I have a local train station does not mean everyone has one, although in my town trains don't run in winter except for Santa Specials. But if you are paying talk talk then talk talk should sort it out, Sky does, so would assume others would do the same, but my experience with talk talk was if not easy, then they simply say sorry contract cancelled. I note there Utube guide says their box will not work with satellite dishes, My IceCrypt STC3250CCIHD box, and my TV will both work with both terrestrial and satellite together, I don't know when selecting program or watching if using satellite or terrestrial without special search, it puts satellite channels on higher numbers to terrestrial as standard, but I can arrange channels so I have for example ITV1, ITV1+1, ITV2 etc and so ITV 3 may be terrestrial but ITV3 +1 is satellite (mainly as terrestrial close down half way through a program).
So you have a few options.
1) Ask landlord.
2) Ask talk talk.
3) Find if terrestrial is available, if so get aerial repaired or replaced.
4) Buy a satellite box.
If you opt for latter, unless paying for Sky, be aware many cheap boxes the electronic program guide is useless or poor, the more expensive freesat has a proper 7 day guide, but also programs are fixed, I find the IceCrypt has better picture as HDMI not SCART but the very old Sky box without a card still works with a very good 7 day guide, better than the more updated Sky+ box as it can be set to auto change to pre-selected program when it starts. I have got use to poor Freeview and new TV's have satellite input on the TV. To be frank a box is better, don't know why, but the TV seems to be missing some programs which are found with the free to air box.