Mandanda is your best bet by far with his release clause and will join right away! Stephan Ruffier/Cedric Carrasso/Handonovic/Sergio Romero
Jefferson - Botafogo is really, really good and can be bought for around £12.8m and asks for very decent wages and becomes Worldwide rep in a few months (well he did after signing with me)
Kurt Zouma - St Ettienne can be picked up for around £10.5m on the first couple of days and being tutored by King/Gallas will become your best CB in the game after a few years... If you want someone a little more experienced then:
Mehdi Benatia/Aymen Abdennour/Davide Astori/Salvatorre Bocchetti/Nicolas Otamendi/Adil Rami/Inigo Martinez/Mikel San Jose/Stefan Reinartz/Rafael Toloi/Sebastian Coates/Ezequiel Munoz/Douglas/.Kader Mangane/Nicolas N'Koulou/Aurelian Chedjou to name a few...
Douglas and Astori can be signed for free on the 31st December in the first season as well as Adler (as mentioned) Coutinho, Ballack (I think if I remember, quality player still, great tutor)
Tottenham need a good left back, sell Ekotto and see if you can get Federico Balzaretti/Georgiy Schennikov/Leighton Baines instead... Dominico Cristico is very expensive, see what Zenit want for him though
I would also look at a new striker, Mbaye Niang for long term is great (never bought him myself) but see how much Palermo want for Abel Hernandez, its usually around £10m/£14m in the first season, he becomes one of the best poachers in the game!
Sign Romulo - Vasco for £8.25m and watch him become one of the best all rounded mids in the game! quality player, can play several roles well!