As your are centric to your claim and share in the properties originally owned by your father but are in name of your elder brother, the clubbed answer to your queries is as under:
1. So far as the ground floor of house is concerned, you and your sisters can claim partition of it only if the said ground floor was registered in name of your father and thereafter was not transferred by way of registered gift deed.
2. You would fail to claim any right in the leased shop, however you may claim your rights in the share of profit that belonged to your father and also seek injunction from the civil court against your elder brother's access to income from the shop.
3. For the apartment purchased in joint name of your mother and your elder brother, you can claim succession rights qua the portion of your mother. i.e. if your mother is 50% holding share in the apartment then you and your sisters are entitled to claim 1/8th share each.
4.So far as SEC land is concerned, it will be difficult for you to practically prove that payment was done by father and from shop. Unless you have financial statements to prove the same, you cannot claim any share in it as the land records show the title of such land in name of your elder brother.
5. For few of the lands exclusively purchased in name of your mother, you and your sisters can claim 1/4th share in each such property by preferring partition suit.
Considering the above positions of each property in which you are claiming your right, it is advisable for you to prefer a suit for declaration and permanent injunction for the properties which are in name of your elder brother and your father has invested money into it.
For rest of the properties you need to file a common suit for partition claiming your share in the properties.
Once both the suits are filed, place an civil miscellaneous application under Order 40 Rule 1 of CPC in both the suits for appointment of receiver until the suits are finally disposed off. This will help you to take care of all the properties and get the profits distributed proportionately between you 4 siblings until the final disposal of the case and would cease your brother from taking undue advantage of the properties running in his name.